Depletion Rate Articles and Posts

Articles

2005. Matt Simmons. THE WORLD’S GIANT OILFIELDS How Many Exist? How Much Do They Produce? How Fast Are They Declining?

Posts

July 13, 2005.   “Powerswitch” Clive Smith

What seems to be happening…is that our new oil extraction technology, developed over the past 30 years, has allowed us to pull out more oil out of the ground, sooner (in newly developed fields, i.e. North Sea in the 70s) and prolong the peak or plateau (in new and older fields). Unfortunately we are now becoming more aware that the consequences of this: a much sharper decline….

Particularly in the fields like the North Sea, that were brought on line and
pumped at maximum as soon as possible, to meet maximum profits at the time
when this new technology in the oil industry was being used to its full potential.

Now 5/6 years after the peak in the UK sector, we are seeing 10% declines a
year in the North Sea… which is huge.

You have to understand, that the oil companies are not here to save the
world or to look after natural resources. They have shareholders and want to
maximize their profits. The Western Oil companies, pump out oil at the
fastest rate possible to generate revenue on their investment, using the
latest technologies available. It just so happens, that to do this, means a
much faster collapse in production after peak of these fields.

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August 3, 2005  Oil depletions are not created equal

http://theoildrum.blogspot.com/2005/08/oil-depletions-are-not-created-equal.html

[snips throughout] Chris Skrebowski “on Understanding Depletion” used an average depletion rate of 5%, with other sources using 7% for a well in depletion. http://www.globalpublicmedia.com/articles/386 These are averages used until now to estimate how long fields will last, and how much new oil is needed to replace such losses in a market where supply exceeded demand. This average held up, where conventional methods of oil removal (primary recovery using vertical wells, then secondary and tertiary recovery) were used. However, there has been a recent change in the way oil was recovered, initially in the Middle East. Rather than get the oil out in a three-step process, as horizontal drilling came into favor, it was combined with the concurrent injection of water below the oil layer to maintain reservoir pressure and more rapidly recover the oil. (For a sectional view of such a field in late development see here , and for a greater discussion here). The method was very successful and has been adopted in other countries, and in the North Sea, as a way of getting more oil out faster. But here is the rub, because of the success in producing the oil, when the field depletes it drops at a much faster rate. The first place where this was seriously realized was in the Yibal field in Oman  (For more on Yibal see Green Car Congress http://www.greencarcongress.com/2004/04/the_shadow_of_y.html). The results for Oman have been  significant…    production levels – currently at 750,000 barrels per day – have actually fallen considerably in recent years, dropping 8.9 percent between 2002 and 2003 alone. And they are not alone, the production drop in the North Sea is now running over 11% a year. This is of concern because the projections have been used as the basis for British investment plans

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Nov 17, 2005 1:30 pm    Post subject: Exxon, and the Implications of 8%

http://peakoil.com/modules.php?name=Forums&file=viewtopic&t=14953
Stuart Staniford:
As noted at the recent ASPO-USA conference, Andrew Gould, the CEO of big oil services firm Schlumberger, has been saying for a few months that:
…the industry is dealing with a phenomenon that is exaggerated by the lack of investment over the past 18 years. This phenomenon is the decline rate for the older reservoirs that form the backbone of the world’s oil production, both in and out of OPEC. An accurate average decline rate is hard to estimate, but an overall figure of 8% is not an unreasonable assumption. The maintenance required to slow the rate of decline, and increase the overall recovery, is a key element of the supply picture going forward.
He also notes what has been extensively discussed here at the oil drum (TOD):
Finally, the oil service industry is not in particularly good shape to meet the needs of a rapid worldwide ramp up in activity. A lot of the rig fleet, and much of the equipment are old. Very little spare capacity exists. This combination will compromise the service response, but the most disturbing shortage by far is the lack of specialized E&P professionals. A lot of skilled people have either been laid off, or have retired from the industry in the last 18 years. This shortage is as acute on the service side as it is on that of the operators. Training their replacements takes time, and there is already a great deal of evidence to suggest that the industry is fighting over the core of professionals that remain.
It’s also been noted by the EIA that Saudi fields are declining by 5%-12%, and that Iran’s fields are declining by 8%-13%. So OPEC countries appear to generally fit what Andrew Gould is talking about.

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Nov 19, 2007. Stuart Staniford. Is the Decline of Base Production Accelerating?

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Jan 21, 2006 A 5% decline is not as gradual as it may sound. I don’t think even most peak-oil aware people understand how catastrophic a 5% decline could be. A 5% decline would cut total production by 50% in 14 years. So if the decline begins in 2008 from a peak of 90 mbd, the world would only have 45 mbd in 2022.  Most of this 45 mbd would be from highly unstable areas, and a significant portion would be from low EROEI sources like oil sand. But let’s put those aside for a moment and just focus on the total number. 14 years ago, we were using about 65 mbd.  Today, we use 85 mbd. How do you think the world would look if we had peaked 14 years ago and today had to manage on 33 mbd instead of 85 mbd? IN order for “business to continue as usual” we need that extra 3% or so per year. So a 5% decline year is really an 8% shortfall per year.

Today, I got email from Kyle Swanson, a Professor of Mathematics and Atmospheric Sciences at the University of Wisconsin-Milwaukee. Kyle looked into what would happen if one did a MegaProjects style analysis on Exxon circa 2001. (Exxon being the most optimistic of the big oil companies – eg. the one not yet running ad campaigns asking the public for help in producing enough oil). Kyle’s conclusion:

Looking over Exxon’s annual reports for the past 5 years, I think that a reasonable case can be made that Exxon’s internal liquid decline rate is actually about 10%.

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July 2006 Mr Samsam Bakhtiari testifying to the Australian congress

My WOCAP model has predicted that over the next 14 years present global production of 81 million barrels per day will decrease by roughly 32 per cent, down to around 55 million barrels per day by the year 2020.

Thus in the face of peak oil and its multiple consequences, which are bound to impact upon almost all aspects of our human standards of life, it seems imperative to get prepared to face all the inevitable shockwaves resulting from that. Preparation should be carried out on individual, familial, societal and national levels as soon as possible. Every preparative step taken today will prove far cheaper than any step taken tomorrow

The supergiant oilfields are all very great oilfields. Today you have 40 per cent of world production in these supergiants. Managing a supergiant is a very difficult procedure. The larger the supergiant, the more difficult it is. I will firstly state the case of Ghawar. Why? Because it is the largest oilfield in the world by far. At the beginning, it was estimated that it had in 1952—that is when it came on stream, which is some 54 years ago— some 70 billion barrels of recoverable oil. That was 54 years ago. In the meantime, much of that has been already recovered. The situation for Ghawar today is that you have two major problems. It is still producing, we think, between four and 4½ million barrels every single day, but in order to produce that much oil much needs to be done. I will show you two points, if you allow me. A whiteboard presentation was then given— Let us assume that this is the oilfield. What is happening today is that they are injecting eight million barrels of sea water every single day. What do they get out? This is very schematic. They get 12.5 million barrels of liquid out of the field and they split that into eight million barrels of water and 4.5 million barrels of oil. The water that they are injecting is increasing constantly.

So when they say that Ghawar crude is cheap, it is certainly not cheap any more, because you have to do all this enormous processing. You have these huge pipelines which come from the sea and an enormous compressor reinjecting that water under the oil column and pushing the column up. That is one point. There are problems. If you did not have problems you would not need to do all that.

They have done something else. Usually in all these supergiants you drill vertical wells and you take out the oil from the vertical wells by the pressure either of the gas or the water. That is how it is mostly in the four supergiants in Iran. But in the 1990s there was a new technology called horizontal wells. In Ghawar they thought that instead of relying on the vertical wells they would drill horizontal wells. Horizontal wells are both a blessing and a curse. Why?

The horizontal well is different. It comes down like this and then it goes horizontally for a few kilometres. The horizontal well is a blessing because you can get to the exact middle of the oil structure and so take out your oil more easily. But there is a very great danger with horizontal wells. They tell us that in Ghawar today there are 220, roughly, horizontal wells. The great danger of the horizontal well is that when the water reaches the well it is dead. So one day in the future at Ghawar, the water level will eventually reach the horizontal well.

Yes, it is happening but not on a large scale. When it happens on a large scale then Ghawar is going to collapse and you will have a cliff in the production of Ghawar. When you have a cliff there, the whole Saudi production system is going to fall apart. If that happens, we will start hearing bells ringing all over the place, and the price of oil is going to go through the roof.

It is extremely difficult to forecast precisely the price of oil in the future. I can see a range of $100 to $150 not very far into the future.

In my opinion, we could get there very easily. We are a couple of hurricanes or some geopolitical problems or a war away from having a worse problem than we have today. There you could go very easily, but after that where can this price go? I am studying that right now, and I have not reached a conclusion yet.

There must be some outer limit, and I am beginning to think that maybe the outer limit could be $300 per barrel. I am not so sure yet, because we are entering a brand new era in human history, an era we have not been prepared for at all. For the past six generations, we have been used to having cheap oil always available whenever we wanted it, more or less. Today, in 2006, all of this is beginning to change. We are entering an era in which we know nothing much, where we have a brand new set of rules. I am trying to find out what these new rules are. I have already reached two or three new rules. One of the new rules, in my opinion, is that there will be in the very near future nothing like business as usual. In my opinion, nothing is usual from now on for any of the countries involved. And the lower you are in the pile, the worse it is going to get.

When there is not enough oil, first you will have to raise its price and then you will have the problem of its availability. There may be some kind of worldwide rationing—I do not know. I am trying to look at the future but the future I am talking about, as you mentioned, might be beyond 2020. Maybe beyond 2020 we will have some reasonable idea. What will happen after that is very difficult to predict. I do not think the oil companies would like such a scenario at all. They will be forced—

Maybe they are saying this because they want to grow and buy smaller oil companies. They might say that they will buy at $30 because the price is going to fall to $25, so $30 is a very good price and would be a very good price to pay a small company. And there are other problems. Nobody likes the idea of peak oil. Firstly, you have the politicians. Naturally, a politician will never say that there is such a thing as peak oil. It is suicide to give bad news so a politician will never do that. He will always say, ‘The IEA says that we will be having 118 million barrels in 2030 so why worry?’

Secondly, you have the media. The media does not like peak oil. Why? There is no sponsorship for peak oil. The oil companies do not like peak oil because you should not say that your soup is cold; you should always say that it is very hot and very tasty, yes? So nobody wants to hear of this phenomenon of peak oil. I believe that some of the institutions—-I will not name them; they are here and maybe you can guess which ones they are-—are saying these things to act as a protection for some politicians who can say: ‘Because these institutions are saying these things, then we follow them. We do not follow Campbell and others.’

Senator JOYCE—It could also inhibit the development of a biorenewable fuel industry too. If they say there is a lot of alternative product around, then they do not need a biorenewable fuel industry.

Dr Samsam Bakhtiari—I do not believe that there are alternatives around. In my opinion there is no alternative to crude oil. There is nothing that can replace it, and this is the problem the world is facing today. There are no alternatives and I will try to explain very briefly why. In general economics we are taught a very basic rule. When the price goes up, demand comes down, and you have the marvellous figure of Professor Sam Wilson to explain exactly how this works. For crude oil this does not work at all. We were always taught that when the price doubles demand will come down by something. In the past two years the price has tripled and demand has not come down by anything. How far can we go? Nobody knows. I think that it will take three digits—at least over $110 or $120—for us to start seeing demand maybe coming down.

Why? Firstly, you have no way of preserving oil products easily—no way at all. We are all used to the car and we want to drive that car as far as we can possibly pay for it. Even at prices of $1.40 per litre for petrol you are beginning to have problems in the population economically, so what will it be like when the prices are much higher than that? $1.40 per litre is one of the cheapest prices in the Western world. It is just a little above fuel prices in California today so it is very cheap.

Not only do you not have preservation, you do not have any means of substitution, and I will come back to your previous question on alternatives. There is no alternative to crude oil. For the ones who believe that GTL is going to be an alternative, I am sorry to say that this is not a fact. Today you have only 85,000 barrels per day of GTL capacity in the world. I do not think you will ever have much more than that, and 85,000 is nothing. It is a drop of water in an ocean. The latest GTL plant has just been started in Qatar and I do not know how it is going to fare. It makes 34,000 barrels. It is an enormous plant. I think it cost one and a half billion dollars at least. It has two enormous reactors. If anything goes wrong with these reactors—my God, I do not know what is going to happen! So that is for GTL.

You have coal to liquid. The only coal to liquid plant today in the world is in Secunda in South Africa. It makes 150,000 barrels per day of liquids. I can tell you that because I have visited it, half by helicopter and half by walking around the facilities. It is a very messy affair and it is very inefficient energy wise. Now the Chinese are trying to make CTL—coal to liquid—of one million barrels per day capacity. I think it is going to cost them $10 billion at least. I cannot imagine how this site is going to be. I am waiting for them to finish, but it will probably take them quite a long time to get that one million barrels per day off the ground.

You mentioned ethanol, biodiesel and all that. This is not the future. This is not sustainable because in the future, if our predictions are correct, the No. 1 priority will not be transport and all that. The No. 1 priority is going to be food. And for food you will have to have top priority for fertiliser and insecticides and whatever you need to produce food only. So ethanol is a very, very wasteful system. And again, however much you want to make some ethanol, it will still be a drop of water in the ocean. Just let me tell you that for every litre of ethanol you will need between three and four litres of water to produce it. The best way to go for these types of fuel, and certainly the most efficient way, is sugarcane. That is what the Brazilians are doing today. With sugarcane you need one square kilometre of sugarcane to produce 3,800 barrels of ethanol per year. It is not very easy and it is very inefficient.

So I cannot see any of these alternatives coming up in the future in a big way. Now, certainly solar power will have a small role to play. Today it is still very expensive at between roughly $US 7,000 and $US 10,000 per megawatt. But it could certainly play a role, especially in Australia where you have quite a lot of sun and quite a lot of land to develop that. Wind also, in windy countries, could play a small role. But these roles will amount to two to three, or maybe four, per cent of oil consumption over the next 15 or 20 years, and not more. The orders of magnitude are not at all the same. You will make a small dent with each one of these but not much more than a dent. Replacing crude oil is not that easy.

CHAIR—I would like to follow up on this issue of price. The Australian Bureau of Agricultural and Resource Economics—ABARE—in their submission to us have done predictions based on future oil costs of $US30 per barrel. How realistic do you think that is?

Dr Samsam Bakhtiari—I believe you will never, ever see $US30 per barrel again unless you have a bird flu epidemic that wipes out at least millions of people or, as Senator Joyce said, something hits the planet and disrupts all calculations. Senator JOYCE—That takes out Europe. Dr Samsam Bakhtiari—I cannot foresee anything below even $US50 per barrel. That in my opinion would be very bad news, because if it goes back to, say, $US50 per barrel for some reason and for a short period of time, people will think: ‘Ah! So $US75 was just a spike and now we are back to the good old days and we can begin consuming again. Let’s go and buy that big SUV that we were looking at.’ You then lose two or three years at least. So $US30 in my opinion is absolutely impossible. You can quote me on that.

CHAIR—Thank you. My next question relates to the industry. BP when they made a presentation to the committee said that the prices now are basically the same proportionally as the spike in the 1970s. What is your opinion of those comments? Dr Samsam Bakhtiari—If you take into account inflation, it is the roughly same—it was $US75 to $US80 in those days. But those were spikes. Today it is a totally different problem. Today it is a transition into the unknown; then it was known. I am now personally of the opinion that if they had continued with the spikes we would have been much better off today. But they did not. After the two oil price shocks of 1973 and 1979 you had two price counter shocks in 1987 and 1998, when it dropped below $US10 per barrel. That was very bad news, because then demand started going up again. If all these reserves had been better controlled, maybe the transition would have been much easier. Just to remind you, in 1950, which is not that long ago, global consumption was only 10 million barrels per day. That was very easily controllable with the reserves we had. What is not easily controllable is the 81 million barrels per day that we have today.

Senator MILNE—In your opening presentation, you said that you thought that in 2006 we had begun transition 1, and that it would be a relatively gentle stage, and then we would go to extreme discomfort, presumably in transition 2. Can you outline to me the time frames you see for each of the transition stages, and how they will proceed? What will trigger moving from transition 1 to transition 2? When do you expect the real crisis to hit in that transitional phase?

Dr Samsam Bakhtiari—Certainly. From now on, from 2006 to 2020, making predictions is an extremely difficult process, because we do not know exactly what to expect of these transition periods. But I have decided for the time being to split the next 14 years into four transition periods, which I call transition 1, 2, 3 and 4. Every transition period has a steeper gradient and I do not know exactly how long each of these will take, because it depends on many factors. Nevertheless, I envisage now that transition 1 should take between three, four or five years, but I would have to revise this every three to four months.

We are here in 2006, which is, according to my model, the first year of transition 1.

I want to make an aside here — there is nothing worse for an oilfield than to be pushed. I believe that is what is happening to oilfields like Ghawar and Cantarell. They have been pushed. A better example is the Samotlor oilfield of Russia, which Tuesday, was a marvellous oilfield that the Soviets in the 1980s, when they badly needed money to have a system that would be a rival to the American Star Wars, destroyed, in my opinion. It was an extraordinary oilfield which could produce three million barrels a day. Today it is only producing 300,000 barrels a day. If they had managed that oilfield better, I think they would have had a much higher return. Pushing an oilfield is not very good for it. Letting an oilfield rest is the best thing you can do for it. The Iraqis’ oilfields had a marvellous time during the 1990s because they rested for a long time. I would be glad if such a thing could happen to the Iranian supergiants—if they could rest for some time. I think it would not be bad.

Between the beginning and the end of T1, you will have the two major scales tilting. At the end of T1 you will have a supply, and this supply is going to dictate the demand. Here you will have entities which will have the marginal demand. So it will be a totally different system form what we had at the beginning. It is this tilting of the scale that will in my opinion determine the end of T1. We have just begun shifting from one to the other.

In the time frame of T1, you might have some volatility in that it will start shifting to one side and then shifting back again to the demand side and going back and forth. So one has to be very careful. But in the end it will be the total shift that will in my opinion make the end of T1 clearer. About T2, T3 and T4, it is still very early. I am working on the next transition, but first we have to get this transition right.

One thing I might add about T1 is that I see not only that business as usual is not in the new rules but also that mega projects are not to be begun, because mega projects are long-term projects that take 10, 20, maybe 25 years. Because we do not know exactly where we are going at this stage, it is very dangerous to begin mega projects. But people are still doing this. The Europeans have begun a freight train line from Barcelona to Kiev, which is roughly 2,600 kilometres. The idea of having freight trains is a very good idea, but it is a bit late now. If you have rails you might make the service a bit better, but you should not construct it from scratch because it will take 20 years and cost at least 1/4 …GARBAGE CHARACTERS…ever be finished because the high oil prices will trigger rises in prices for all other commodities. You already see that steel is way above the usual prices. Copper has hit between $7,000 and $8,000, and it will go much higher than that. Nickel is $22,000. I think $22,000 is very cheap today; it will go much higher. All these commodities and all these metals will go very much higher, because it is the crude oil price which dictates the prices. Sugar is going up, orange juice is going up— everything is going up—because the price of crude oil is going up. It is the price of crude oil which more or less dictates all the other price hikes. In my opinion, you will have a correlation between all the price hikes in the future, and you can already see the first signs now.

Senator HUTCHINS—What do you see in transition phases 2, 3 and 4? Do you see any specific dates?

Dr Samsam Bakhtiari—No, not now, not yet. The gradients will get steeper, so the effects and the impacts will be greater. T1 is very benign; the gradient is very slow and you almost do not notice it. We will go from, maybe, 81 to 79½ over the next few years; it is not difficult. But T2 will be much more difficult—it is already—because it will start dropping considerably; then you will notice the drops every year, probably, and then it will get worse and worse. It is a process, fortunately, where the introduction is easier than the following phases. But it is still very early to start predicting what T2 will do. Firstly, we have to see what T1 is going to do, because already, in many aspects, T1 is difficult to predict, with all the events that could take place in the next three to four years.

Senator HUTCHINS—But you yourself have made a prediction that you do not see that the rail link between Barcelona and Kiev will be, to use my words, economically sustainable.

Dr Samsam Bakhtiari—No.

Senator HUTCHINS—What should governments do if you say that supply will determine demand? Dr Samsam Bakhtiari—I think that every society, every city and every government should do a certain number of things—many things; 1,001 things. There are not one or two solutions. There is no panacea. There is no silver bullet that you can just shoot to get rid of this. You have to start as early as possible and think about this type of future. I do not think the Europeans are ever going to make it. I do not think that Airbus A380 is a valuable aeroplane. It is a marvellous aeroplane, but it is arriving at the wrong time. They should have built it 20 years ago—and it would have been marvellous—when we were in the ascending curve of petroleum, not in the descending one, and not now that we have entered T1. I told them five years ago but naturally they did not want to listen at all, so they carried on. Now they have the problems and they are paying the penalties to all these companies already. It is still not commercial. I do not know why it will be commercial. I do not see a very bright future for that.

There is not too much innovation now; there is certainly a returning to commodities and exploration. I know of a company in Australia that invested very heavily and has just found a brand new copper mine. That is fabulous, because the copper they are going to extract in a few years is going to make enormous profits. If you put money into oil exploration—whether onshore or offshore—almost whatever you find is going to make money. These are types of investment. Or you could invest in agriculture but not ethanol or biodiesel.

Senator HUTCHINS—Yes, I was going to ask you about that—and I do not know if that is the point we are at, Madam Chair. You seem to be dismissive of alternative fuels.

Dr Samsam Bakhtiari—Yes. I do not think it is a very good idea. You can always try it on a small scale, but I think that energy wise it does not make much sense. Now we are in transition 1, I try to look at things from an energy point of view, not from an economic point of view. We do not know these days exactly what economics are. You have to think energetically and about the things you really need. For example, Western Australia—sorry is doing all the right things. They were kind enough to have been the very first to invite me, and I am very happy for them.

Western Australia does not have enough water and the water table is falling. It is a very big problem. They are putting in two desalination plants. They are obliged to put in two desalination plants. The desalination plant will need fuel—it will need gas—to run. In my opinion, they have no alternative so they are obliged to do this. When you are forced then you have to do it. I see that one problem in the future in Australia, much more important than the oil problem, is going to be water.

Your precipitation is going lower and lower. I heard that in June you had an average of only 14 millimetres of rain instead of the normal 108 millimetres. When I crossed from Perth to Sydney in the plane, over 3½ hours, what I saw was very dry. I think one of the problems is water. When you consider that every litre of ethanol or biodiesel will take between three and four litres of water then you start having a problem on the water side and on the energy side. I think you have to reconsider the economics of all of that in the near future.

Senator WEBBER—On that optimistic note—being a Western Australian—what do you consider the prospects for the future of gas as an alternative?

Dr Samsam Bakhtiari—Gas is the big issue, because we are not only having peak oil but, according to my prediction, in 2008 or 2009 we are also going to have global peak gas. Peak gas and peak oil are two totally different things because oil is a very special commodity. Gas is not the same because you cannot just put it in a ship. You either have to consume it locally, pipe it to some other country or put it in a LNG tanker. You have only those three alternatives.

Fortunately, Australia has an enormous amount of gas, and I believe this is going to become very handy because the peak for gas will be between 100 and 105 TCF global production in 2008-09. Because of this peak in gas, you will have enormous problems all over the world but firstly in the US. The price of gas is going to go sky high. Today, it is incredibly cheap. Gas in the US has a threshold price today of between $7 and $8 per million BTU. This is going to go much higher. Every year you will have to add $2 to $3 to that price. The US price is going to affect all the other prices, and it has already begun in South-East Asia. All that will be linked through the LNG price that you will have, and the price of LNG is going to go very high. I think that Russia does not have much gas anymore, although it is the largest producer in the world. I am very worried for the Europeans, and probably this winter you will see that the Europeans are going to have an enormous number of problems. If it is a harsh winter in Europe, you might have thousands of people dying. You had hundreds last year, but that was only the beginning. If this winter is harsh, you will have thousands dying because the Russians simply do not have enough gas to provide to Europe.

The Americans do not have enough gas. The Americans had the incredible chance to have the mildest winter last year in 100 years. If that had not happened, I do not know where the price of gas would be today. That was very lucky, and they now have enough reserves for the coming winter because all the storage depots are almost full. That is a positive point, but the Europeans do not have that kind of chance, so you will have lots of problems. The price of LNG is going to go sky high because everybody will want LNG—in America, Mexico and Canada, which are in full decline; in all the South-East Asian countries and especially in China; and even in Europe. If the Europeans cannot get the Russian gas, their only solution will be to get LNG from wherever they can.

I can tell you that, with gas prices in the US being around $6 per barrel, you have LNG spot sales today of $12 per barrel—and we are in a normal situation. So, wait for the panic and you will have prices of $25 or $30 per barrel, and maybe much more than that. For one week in March this year the British did not have enough gas and the price of gas shot up to $258 per barrel oil equivalent. At first I thought I had made a mistake of one decimal place, but then I realised it was not $25.8—it was $258. For one week they were paying that price for their gas. And we are in a very normal situation now; we are not at peak yet. So you can imagine how it is going to be when it is at peak, with the panic in all those countries because of the winter months. Just wait and see how it develops this winter in Europe.

Senator WEBBER—That is pretty dark.

Senator JOYCE—Going back to the biorenewable fuels issue, ethanol is being used in Brazil, and the terminal gate price of ethanol in Australia is around 80c a litre, so the reason that it is not being utilised is that the oil companies refuse to take it up. I have heard of a lot of what is going wrong but what we are really looking for is the solution; we are looking for the way out. Or is the world as we know it going to come to an end and this is just a prologue to the end? We need to find the solution. I do not say ethanol is a panacea but it is certainly a mitigating circumstance. We need to take it up. It could run conjointly with a whole range of issues. I have two questions. Firstly, if ethanol is not the answer, can you explain why it is being used so prolifically in places like Brazil, and why the United States, Europe and Asia are all taking it on board as a component of trying to deal with the impending oil crisis—or the oil crisis that is already here, apparently? Secondly, what is your solution? What is the noble horizon we need to head towards in order to maintain our current standards of living and economies?

Dr Samsam Bakhtiari—Allow me to take those questions one by one. First I will address the alternatives. Brazil can use ethanol as a fuel because of its enormous amount of sugarcane. There is also the idea of self-sufficiency. People like the Brazilians and the South Africans always have a complex about self-sufficiency. If the South Africans have gone after GTL and have pursued coal to liquids, it is because they want to be self-sufficient. It was not an economic decision; it was a political decision. I think the Brazilians are in somewhat the same situation. For them, because of the enormous amount of sugarcane they have, it does make some sense, but I really doubt that it makes a lot of sense in terms of energy. And I believe that, come the day there is conflict between producing ethanol or biodiesel and producing food, food is going to win because, first of all, you have to eat.

There is another danger in Brazil. They are destroying the Amazon rainforest at the rate of some 20,000 square kilometres per year and on that land they are planting food crops —in enormous amounts. I think that this will also be part of the future: when the other countries do not have enough food, they will go back to the Brazilians. Brazil has become one of the largest exporters of food in the world, whether it be soya beans, sugar, coffee or beef. It is almost anything. They have the surpluses. The Americans are also trying to get the ethanol. It makes a small dent for the time being, but not a very big one. I think that it is only a question of a few million gallons. I do not know what percentage you have, but it is not very much.

All of the others are trying. I heard there are a few million in Australia, but it will not make a very big difference, so I am not very keen on these types of bio alternatives. As for your second question about what should be done, there are many things. Everyone should study their own situation and see what can be done with the possibilities at hand, and not one thing, not two, but 10, 20 or 50. In my opinion, the first thing is to develop free public transportation, and that applies to everybody. Make it free from now. Even if it does not make very much economic sense now, it will in the future. Certainly, there is absolutely no doubt, as you go into transition 1, that free public transportation has to make sense. That is one of the things.

There are many other things that you can do. Plan; get new ideas from the grassroots. That is what Perth has been trying to do, to congregate 1,200 people from different walks of life in teams of eight, give them each a computer and have all of these ideas go back to the top for the selection of the ones they think are viable and useful. Have teams of elders. You have a fantastic man out there, Mr Brian Fleay. He predicted peak oil in 1995. It is extraordinary what he did. He was maybe the second person, after Dr Campbell, to have done that. And he did it almost from scratch. So people like this could have predicted that in 1995—in 1995 he wrote his book, so he must have predicted it in 1993 or 1994.

Or create steering committees through such people, and then get younger people to come in, very bright people, to start setting the priorities, because one day you will have to set priorities for the use of petrol. Have these in place soon, maybe in the next year or two. You will not need them in the next year or two, but have them in place already so that you are prepared. Get prepared for any eventuality. Have a special committee for that now. That is what I can see. I can advise that such things should be done this year or next year so that when or if the crisis really hits, then you have something to fall back on; you have a team that is already prepared and who has thought these problems through.

Thinking about these problems is very important, but there is something else. It is going to be very, very difficult to change the minds, to have the minds set on the new realities. For six generations we have been thinking one way—that is, that petrol is always there, petrol is not too expensive, oil products are not too expensive. We do not think about it. We do not think about fertilisers. We do not think about insecticides. Why? They are not that expensive, so it does not come into the day-to-day consideration. Petrol was always $1, not that much of a problem. We are used to that. The problem is going to be when it becomes $3 or $4 or $5. Then people will notice. Already at $1.40, some people are beginning to think about it, so when it becomes higher they have to change their minds, their way of thinking and their way of planning.

Dr Samsam Bakhtiari— [in reply to a question about shale]. There is a lot of shale—many thousands. There is an enormous amount of oil in there, but it is a very messy and difficult industry. In Canada, you have about 1.1 million barrels per day of synthetic crude oil produced, which is being exported mostly to the US, and which makes economic sense, especially at the prices of $74 to $75 per barrel. I think it costs them around $30 to $40 per barrel, so they are making some money. But I think it is limited, and I think the limits to that industry are, according to my prediction, roughly three million barrels per day. I cannot see Canada or the US together making more than three million barrels per day at the 2020 or 2025 horizon, investing enormous amounts of money. The shale oil industry is like the oil industry. You go to the best places first, naturally. And then, as you go along, it gets more difficult, it gets more expensive and it gets messier. I think you need roughly 2,000 tonnes of shale oil to make one barrel of synthetic crude oil. You can imagine, on an enormous scale, what that involves for the land and for everywhere else.

Already, at the level of 1.1 million barrels a day, the Canadian rivers are becoming so polluted as to have triggered alarm bells over Canada; the fish are dying and it will soon be impossible to clean up all the rivers. There are side problems for that as well. If one day we reach three million barrels per day I do not know what the situation will be there, but I do not think we can go further than three million; that is it.

There is also the heavy oil in Venezuela. Today there are 600,000 barrels of capacity. I do not think the Venezuelans can go beyond twice that amount, and with the government they have now they are stuck with their 600,000. I do not think anybody will be willing to invest in such expensive and difficult processes of exploitation. But even if the conditions were right I think they can go to 1.2. I really cannot see them going much further than that. So, yes, there is the potential but you have to transform the potential into production.

I forgot to tell you about the tar sands and the shale oil. All the heat you need for that comes from natural gas. You are spending 1½ million BTUs for every barrel you are going to produce; that makes a lot of gas. What the Americans are beginning to tell the Canadians is, ‘We’d rather have this gas than anything else.’ So you have other problems that arise in this exploitation—at most, three million for tar sands and shale and one million for the Orinoco heavy oil. That makes a total of four million over the next 20 or 25 years. It will not change a thing for people—it is a drop of water—in the 81 we are facing now.

Dr Samsam Bakhtiari— [when asked about oil company profits ] I think that oil companies are like all corporations: they want to make profits, and they want to make the highest return for their shareholders. In 2005, they set new records in every country for profits. I think that in 2006 they will have far higher returns and record profits of, maybe, $50 billion for Exxon or something like that. It will be roughly the same, maybe $40 billion, for BP and a bit less, maybe, for Shell. Their shares will be reevaluated all the time as the price of oil goes up—and, as I told you, it can only go up.

But they control part of the system. You have many players. You have the national oil companies now, like Saudi Aramco, the National Iranian Oil Company and the national oil companies of Kuwait or Qatar. The oil companies control part of the system and it seems that their share of oil production is beginning to decline as well. It is still quite substantial, but it is also beginning to decline. Naturally, I think they are in it for the profits, and they control wherever they are from the wellhead all the way down to the retail. I think they get profit centres all along the way, and they are making enormous profits.

Senator STERLE—I have two questions. If we were to take all the alternatives around the world—solar, hydro, gas, CTL, GTL and all those—how far off subsidising our thirst for oil would that be? Could we supply the world’s demands? Nowhere near it?

Dr Samsam Bakhtiari—Very, very little. In any scenario and in any field for the next, say, 20 years: very, very little. It is a drop of water. If you make the calculation of increasing even by 100 per cent every single year, it is still a drop of water in solar, in biodiesel, in anything.

Senator STERLE—So there really is no alternative at this stage?

Dr Samsam Bakhtiari—No.

Senator STERLE—It will bring in a lot of side issues of employment and revenue for governments—all sorts of things will pop up. If we are not fair dinkum in what we are leaving for the next generation—for our environment, our economies, our communities and our world— we really are in serious trouble. I pick up on that earlier comment you made about public transport and integrating public transport in trains and buses and whatever else there might be. It is not nirvana; it is a reality that we really are confronted with and we have to face.

Dr Samsam Bakhtiari—Yes. Provided that our models and our predictions are correct, this is exactly what you are going to face very soon. I do not want to be more negative, but I have started looking into T2, T3 and T4, and, my God, there are some things I started seeing down there that really send shudders up my spine. But I will spare you that today. Maybe that is for another time. But I entirely agree with your statement. It should be done if only to get prepared so that if things go the wrong way you have something to fall back on—that you have some organisation which you have already set up. As the crisis develops you develop this organisation and make it ever bigger and more powerful to take care of the crisis. There are companies which are employing 300,000 people in 140 countries who do not know a thing about peak oil. I do not know how they are going to react tomorrow. The Europeans do not want to believe this reality. Next year they are going to start—they have already started—dying from the cold. According to my statistics, at least 900 people in eastern European countries froze to death last year. This year it is going to be double or triple that amount. This is the reality already. When there is a real crisis, how are they going to react?

The most important point is that governments do not to cause people to panic. The worst reaction to this type of crisis will be panic. If governments are not prepared there will be panic. The more prepared governments and institutions are, the less panic you will have. Panics are very costly. I entirely agree with what you just said. There is still time to get prepared. We are not that much down the T1 slope. It will be a very slow development, so there is time.

Senator STERLE—Apart from what you saw in Perth with the free public transport around the CBD, are any other countries taking that lead?

Dr Samsam Bakhtiari—No, nobody. There might be a city or two, but I have not heard of any that have taken this drastic step already, and I have not seen such things at all. I can tell you that the future is to rails because rails are the most fuel efficient system. Would you like to see some figures on that? I can illustrate this for you on the whiteboard. This will give you an order of magnitude. At tonne kilometres per litre of fuel, aeroplanes are between two and three, cars are between 10 and 22, trucks are between 65 and 85 and trains are around 320. So on these very simple figures, I think you can see that the future is to trains, but not trains that you build now; trains that you had and that you are going to spend money on. I have heard that Sydney in 2006 is planning to spend half its budget on roads and other infrastructures and half on public transportation—it seems to be roughly fifty-fifty. I think that as soon as you change this percentage towards rail and public, fuel efficiency might begin to make some sense. I think you can see the future here.

CHAIR—It is not planes.

Dr Samsam Bakhtiari—Aeroplanes will be the first casualty in the system. They are already making losses. I do not know how they can carry on because the jet fuel is directly proportional to the increases in crude oil. It is not like petrol. Petrol is very much cheaper because you have hidden subsidies and you have the taxes naturally.

Senator MILNE—I have a strategic question about Iran’s contribution to global oil supply as well as to gas. What percentage of global reserves does Iran hold? If Iran were to stop supplying overnight for a geopolitical reason, what impact would that have on 81 million barrels used perday? In other words, T1 is assuming everything goes along smoothly. Let us assume there is a geopolitical crisis and Iran decides to stop supplying into that 81 million barrels a day. What impact would that have?

Dr Samsam Bakhtiari—At present I think that Iran is supplying roughly two million barrels of oil for exports. In the case of some geopolitical problem, you would have to take the 2 million out of the 81 million. That in itself would not be very harsh. Why? Because major consuming countries have their strategic petroleum reserves. They could start taking it out of their reserves. The latest data on the US SPR is that they have 688 million barrels in their reserves. I believe that the Japanese must have something around 120 million barrels. The Europeans, all together, have roughly the same amount as the Japanese. The Chinese are trying to build up a strategic reserve of roughly 40 million barrels, but they have not started yet. Maybe they hope for the price of crude oil to come a bit lower before they start. They could do that.

What would be impacting heavily on the price is the psychological impact of any geopolitical happening, whether in the Persian Gulf or in South-East Asia. Because the leeway in T1 is extremely small—as I have tried to mention to you—the slightest impact geopolitically will have enormous consequences. If you had in Saudi Arabia, for example, or anywhere else, some two million to three million barrels of spare capacity—that you usually had before—then people would not be so worried about this geopolitical impact. But you do not have spare capacity anymore. I do not believe the Saudis have any spare capacity today, although they say they  have a million or 1½ million barrels. They have no spare capacity. Nobody, in my  opinion—neither OPEC, nor non-OPEC, nor the Russians, nor the Saudis—has any spare  capacity. It would have an enormous impact. The price could go anywhere.

I will give you just one example of what we in NOIC did in 1975 after the first price shock, when the price went from roughly $2 per barrel to $11 per barrel. To find out what the real price was NOIC set up an auction, saying, ‘We have a few barrels and we are going to auction these barrels, so whoever is interested should give us a bid.’ Through the bids, we found out what the real price was. Some bids were up to $41. There were people who were willing, at $11 per barrel, to pay $41.

Then you have the problem that the national oil companies today in the Middle East and in OPEC are not what they were in the past. That is another problem. If there is a disruption, as long as the system is working, you have little problem. It just goes on and on. You see that in cases of earthquake or catastrophe. Once there is a catastrophe, it is very difficult to put it back to the way it was before. You see it taking 10, 12 or 15 years to bring it back. If you have geopolitical problems in the Middle East, it will be very difficult after the crisis has been fortunately somehow solved to put the system back to where it was before. For all these reasons—and because of the herd instinct and the panic that might follow—you could easily have prices doubling overnight. If somebody were smart enough to have an auction, you would see prices that even I could not imagine today.

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JAN 21 2008. Randy Udall & Steve Andrews. ASPO Newsletter Commentary — CERA’s Depletion Study: The “Good News” About Running Up the Down Escalator

Last week the Wall Street Journal ran an article on Cambridge Energy Research Associates’ fascinating new study, “Finding the Critical Numbers: What Are the Real Decline Rates for Global Oil Production?”

Although CERA has put more spin on this report than Tiger Woods drops on a sand wedge, it’s still an intriguing look at a critical topic. Shell apparently thought so, too, and posted the article at http://royaldutchshellplc.com/2008/01/17/the-wall-street-journal-new-fields-may-offset-oil-drop/. (A three-page summary of the report is available at www.cera.com)

Any credible projection of future oil supplies must be based, CERA suggests, “on a comprehensive understanding of the production history of and behavior of existing fields…In other words, how much oil supply will come from currently producing fields ten years from now?” CERA looked at 811 fields, half large, half small, in its proprietary data base, and concluded that the global decline rate is 4.5% per year. Many in the peak oil community think this number is too low by half—Schlumberger CEO Andrew Gould used 8% in a corporate newsletter last spring–but let’s take it at face value for a moment.
Depletion never sleeps. Consider the enormous implications of a 4.5% decline rate. If you start with 85 million barrels a day in 2007, but lose 4.5% each year, by 2017 you’ve lost 31 mbd. That’s the equivalent of losing the world’s four largest oil producers: Saudi Arabia, Russia, the USA and Iran. By 2030, you’ve lost 55 mbd, or as much as all the non-Opec nations now provide. Remarkably, CERA finds this to be “good news.”

“Some of the gloomy, pessimistic ‘peak oil’ views…result from an assumption of high decline rates,” said Peter Jackson, lead author of the CERA report. “This new analysis provides the basis for more confidence about the future availability of oil.”

To his credit, Wall Street Journal reporter Neil King observed that, “The study strikes a more optimistic tone than do many heavy hitters in the industry.” Tom Petrie, a Merrill Lynch vice president with a distinguished career in energy banking, told King, “However you spin it, a 4.5% decline rate is a very sobering fact. People are running hard to find new sources of oil, and that’s just to keep even. When was the last time we discovered another Iran?”

“One Iran” is what we are now losing to depletion each year, and Ben Bernanke can’t do anything about it. Forget resource nationalism. If Hugo Chavez turned into George Washington tomorrow, we would still have a serious depletion problem on our hands.
Of CERA’s 811 fields, only half have entered their decline; the rest are new fields that are still ramping up or on their maximum production plateau. In other words, what CERA calls its “aggregate global production decline” is an average of new deepwater fields, young pups, mature giants, and sclerotic geriatrics.

When CERA looks just at fields that have passed peak, its results resemble those so often quoted on peak oil web sites. To wit, of 308 Non-OPEC “post-plateau” fields, the average decline is 8%. Of 209 post plateau offshore fields, the average decline rate is 10%; 29 deepwater fields are declining at 18%.

The Rule of 72 tells us that an 18% decline costs you half your output every four years. A decline that steep is like a gunshot wound to the abdomen: you are bleeding out.
But fear not, says CERA. Yes, 23 Norwegian fields are declining at 13%, but the good news is that “four of the seven largest producing countries (China, Mexico, Russia, and Saudi Arabia) are below 10 percent….There is no looming crisis linked to rapid depletion of the global reserves base.” In other words, get a life, you doomers!

As we said, there’s more spin on this report than there is kudzu in Georgia. Although the 811 fields aren’t identified by name, the data set is said to be a “representative sample” including two-thirds of current global production, and about an equal percentage of remaining conventional reserves. CERA found that a “surprising 63% of remaining reserves are associated with fields that are still either in the buildup period or on plateau. (“Plateau” is defined as any production level that is 80% of the maximum production level.) This bears some consideration: is global oil production “younger” than some of us tend to think?

OPEC fields “generally decline at a slower rate than non-OPEC fields, possibly in relation to basic geological differences, the relative size of OPEC fields, their locations, and perhaps production constraints set by the organization,“ says CERA. (Although a 2005 CERA report showed Ghawar in decline, a sidebar in the current study proclaims it to be in fine fettle.)

The CERA study confirmed Matt Simmons’ and others’ view that the old giant fields are critical both to the present and the future. “Because large fields (>300 million barrels of original reserves) represent 86% of the production in the study, their lower decline rate and higher production level through extended decline periods is likely to make a major contribution to overall future liquids production capacity,” says CERA.

Futhermore, an “improved understanding of giant fields’ complexities and reservoir models…has arrested decline and, in many cases, allowed production to increase significantly.” Specific exemplars of this “fountain of youth” phenomenon are not identified, but they would not include Prudhoe Bay. (Actually, CERA’s data set only includes 6 onshore fields in North America, which seems odd since 75% of the world’s wells have been drilled here.)

More worrisome, perhaps, is that we aren’t finding many giants anymore, and that small fields peak quickly and expire at 22 years. Almost all non-OPEC fields would fall into CERA’s small category. This may be why CERA’s website summary of the report contains an illustration showing non-OPEC production peaking in 2012, or thereabouts. After that, all future supply increases must come from OPEC.

But not to worry. CERA concludes its report with a double dose of its patented petroleum Prozac, arguing that its results “reinforce our model showing that liquids capacity could climb to 112 million barrels a day by 2017…”

Betting on depletion is like betting on rust. Your authors here, Udall and Andrews, on behalf of ASPO-USA, are willing to wager CERA $10,000 that petroleum liquids capacity won’t climb to 112 million barrels a day by 2017. That wager, in our view, is a sure thing.

Randy Udall is an energy analyst and writer based in Carbondale (CO). Steve Andrews is a Colorado-based energy consultant. They are two of the five co-founders of ASPO-USA.

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17 Jan 2008. Neil King Jr.  New Fields may offset oil drop. Wall Street Journal.

summary of article:

Output from the world’s existing oil fields is declining at a rate of about 4.5% annually according to a Cambridge Energy Research Associates study.

They say this supports a rosy view of the future because it means that new projects will make up for the decline.

The study was based on 811 fields from around the world and rejects the peak oil point of view.  The conclusion states that there is no impending short-term peak in global oil production.

Oil field depletion rates are important and much debated.  The decline rates are being closely watched because the world is heavily dependent on individual fields that have been producing for decades.  Some of these huge fields, i.e. North Sea, Alaska, and the Gulf of Mexico, are declining at rates approaching 18% a year.

CERA says that less than half of the fields were in decline and that decline rates overall aren’t accelerating as some insist.

Andrew Gould, the CEO of Schlumberger says it’s more like 8% per year and growing.

Christophe de Margerie, CEO of Total SA, said “many existing oil fields are being depleted at rates that will do them lasting harm”.

Energy banker Matt Simmons says that very few in the industry believe that the global oil-decline rate is below 5% a year.

Thomas Petrie says that “however you spin it, a 4.5% decline rate is a very sobering fact”.

=============================

Jan 21 2008 I find it amusing that CERA comes out with a statement that the average oil field decline rate is 4.5%, and that the “megaprojects” will provide us with the added capacity to keep peak at bay for a long time to come. Just in November, both Khebab and Staniford on the Oil Drum came to the same conclusion about decline rates, but from two very different analytical approaches. They also found that decline rates were accelerating, but CERA doesn’t address that. That 41% of CERA’s fields under study were in decline must mean that the average decline rate they found for fields in decline must be much higher than 4.5%, which is disconcerting enough. From my experience in the industry, expecting every megaproject to come onstream at their peak rate in the time they are planned is rather hopeful, but frankly, I think the financial and banking crisis we are just seeing the beginnings of will probably be more effective than the megaprojects to extend supply a few more years.

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3 Mar 2008 Oil & Gas Journal.Volume 106 Issue 9 Mar 03, 2008  by Kjell Aleklett
President, ASPO   Professor, Uppsala University, Uppsala Hydrocarbon Depletion Study

Group, Uppsala, Sweden
I understand that the Association for the Study of Peak Oil & Gas (ASPO) will not always be invited to speak at CERA Week (Cambridge Energy Research Associates annual conference in Houston), but if I had been invited I could have discussed the CERA 2006 forecast of future oil production (Journal of Petroleum Technology, February 2007).

CERA’s prediction is divided into conventional and unconventional oil, and if we sum the
CERA-predicted crude oil consumption to 2070 we get a number in the region of 2,000
billion bbl, twice as much as has been consumed to date. Production of 70 million b/d in
2070 requires reserves of the order of 500 billion bbl, and current crude oil reserves
are 800 billion bbl. Adding the numbers, 500 billion bbl plus 2,000 billion bbl, less
800 billion bbl, we arrive at a figure of 1,700 billion bbl. This is the amount of oil
that must be found and developed during the next 62 years, or 27 billion bbl/year.
For these figures to work the oil industry needs to get out and start looking for oil
like crazy.

If we just look 3 years ahead to the end of 2010, CERA perceives that crude oil
production is set to be 80.8 million b/d. This is an increase of 8 million b/d when
compared with today’s production. In 2002 ExxonMobil presented a fantastic graph in
their magazine The Lamp. They showed that the decline in existing oil and gas fields was Expected to be 4-6%/year for the next 20 years.

Last year CERA presented a detailed study of the decline in existing oil fields based on
a study of 811 fields, and that gave an average decline rate 4.5%/year. We at Uppsala
Hydrocarbon Depletion Study Group have made a study of decline in giant oil fields using data from 333 fields, representing 60% of global oil production, and CERA’s stated decline for large fields is of the same order as our figure for decline. For argument’s sake, let us use the CERA number for the rest of our discussion.

CERA’s decline rate for 2008, 2009, and 2010 means that the industry needs to fill a gap
of 10 million b/d by the end of 2010. If we then add the increase in production of 8
million b/d that CERA predicts, we find that the world requires new production in the
order of 18 million b/d in just 3 years. Is this really possible?

First we have to turn to Saudi Arabia and Saudi Aramco as they have the largest
reserves. According to a seminar given in Washington in 2004, they have 700 billion bbl
in place, and the cumulative production for Saudi Arabia to date is 119 billion bbl. Out
of the reported 260 billion bbl of reserves they reported in 2004, they labeled 131
billion bbl as developed, and the depletion rate of developed production was 2.7%/year.
A realistic assumption is that the depletion rate should be no higher the 3% in 2010.
The fact that Aramco claims to have 700 billion bbl in ground, have produced 119 billion
bbl, and have 260 billion bbl in reserves gives a recovery factor of 54%.

Saudi Aramco Chief Executive Officer Abdallah Jum’ah was invited to CERA 2008 and said
that new investment is expected to boost the company’s oil production capacity to 12
million b/d by the end of 2009. With a depletion factor of 3%, this means that Aramco
must increase their developed reserves from 131 billion bbl in 2004 to 146 billion bbl
in 2010. In 1998 Aramco added the Shaybah field and 500,000 b/d. Aramco’s promises
amount to new production equal to four Shaybahs and still require compensation for the
decline of other fields.

Adding the new Saudi oil to the expected increase of production in new deepwater
projects of around 4 million b/d plus other new projects providing an additional 2
million b/d, we end up with a figure of 8 million b/d of the 18 million b/d needed. We
still have to find 10 million b/d to fill the gap in the CERA forecast.

If invited I would have covered many other interesting aspects of future oil production,
but now I would just like to agree with the invited speaker John B. Hess, chairman and
chief executive of Hess Corp.:

“Given the long lead times of at least 5-10 years from discovery to production, an oil
crisis is coming and sooner than most people think. Unfortunately, we are behaving in
ways that suggest we do not know there is a serious problem (OGJ Online, Feb. 15,
2008).”

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June 5th, 2008. David Galland. What the Export Land Model Means for Energy Prices By

David Galland,

http://www.321energy.com/editorials/casey/casey060508.html

DECLINE RATE  ELM Jeffery Brown model

2005        2%
2006     3%
2007     5%
2008     7%  true: aspo newsletter, June 12, 2008:
So far in 2008 net US imports are down by 7.5 percent over 2007.
2009    10%
2010    15%
2011    20%
2012    and so on!

This is an accelerating decline rate!  He predicts the 14% of oil we get from Mexico

will completely stop by 2014. Basically, oil prices likely to double every year (hell,

they doubled going from 5% to 7% decline)

So, what’s the investment angle? Paradoxically, the larger energy companies are probably

a bad bet, because they are forced to replace their depleting reserves, which is getting

harder and more expensive to do with each passing day.  The good news is that there are

no shortage of high quality energy-related investments available… in coal, heavy oil,

LNG, photovoltaics, natural gas consolidators, “run of river” hydroelectric, uranium and

small to mid-cap oil companies with the potential for significant near-term gains in

reserves or production.

In my interview, I also asked Jeffrey to share his thoughts on the situation globally.

Here’s his response.

“Global production peaked in 2005, and we’re now into the third year of decline. And the

critical point, to keep in mind, is our model and case histories show that the decline

rate accelerates, year by year. Using the Lower 48 in the United States as an example,

you can see the annual declines going 2%, 3%, 5%, 7%, 10%, 15%, 20, on and on. So it’s

an accelerating decline rate.

Underscoring Brown’s concerns;

* On April 15, 2008 the Russians, the world’s second largest oil exporter announced

that their oil production appears to have peaked, with production in the first quarter

of this year declining for the first time in a decade. If they have indeed peaked then,

based on the ELM, the world could lose Russia’s current ~7 million barrels a day in

exports within 6 to 9 years.

* Echoing the baseline premise of the ELM, Herman Franssen, president of

International Energy Associates, projects that Iran, the world’s fifth largest exporter,

may consume an amount equal to their exports by 2015. A prominent oil analyst, the late

Dr. Bakhtiari, estimated that Iran is either at, or near peak.

* Most concerning, this April Saudi Arabia’s King Abdullah announced they were not

going to raise oil production above 12.5 million barrels a day. Commenting on the news,

Tom Petrie, vice president of Merrill Lynch said…

“King Abdullah’s quote speaks to the fast-emerging reality of what I call

‘practical peak oil.’ The Saudis and other exporters are placing a new emphasis on

elongating the petroleum exploitation and depletion cycle. This stems from a growing

awareness of the challenges of conventional resource maturity, as well as rising

resource nationalism. This is likely to result in an earlier occurrence of global peak

oil output than many consumers yet recognize.”

Summing it up, Brown told me that “The reality is that this thing is coming so much

faster and so much harder than even most pessimists were expecting.”

===================================

Nov 18, 2008. Matt Simmons. ASPO newsletter

[snip]

IEA big announcement critique
During 2007, the 20 largest oilfields produced 19.2 mbpd of crude or 27% of global production. On average these fields were found 50 years ago and are still the anchor of supply. Of these fields 4 are at peak; 2 fields are in decline phase 1, meaning they are at plateau (producing more than 85% of peak); 9 are in decline phase 2 ( producing between 85% and 50% of peak); and 5 are in decline phase 3 ( producing less than 50% of peak). As we see below, decline rates accelerate as you move from one decline phase to the next.

110 fields produce 50% of global supply while 70,000 fields produce the remaining 50%.
One of the report’s conclusions is that decline rates increase as the fields get smaller. The study is based on 800 large fields. One question is if the adjustment of decline rates to include the 69,200 fields is aggressive enough or whether on a global basis the real decline rate is larger?

Decline rates

Another important finding is the high level of natural and observed decline. The decline rates referred to match fairly well with what Schlumberger has been known to convey, although they always say they have been told by others. These decline rates are also a far cry from what a certain consultancy firm has reported. The surprising thing is that they have both used the IHS database and come up with starkly contrasting conclusions.
The following is a table of observed decline rates based on size of fields in decline phase 1 and 2.

As we fill up the funnel with ever-more new and small fields to compensate for the decline from the old Giants, we can see how it will accelerate global decline rates.
The global natural decline rate for post-peak fields is 9%. This figure is expected to increase to 10.5% in 2030. Based on the tables above one has to ask oneself if this is being too cautious.

Two other interesting data points in the report: the IEA’s own analysis gives a world-wide natural decline rate growing from 8.7% in 2003 to 9.7% in 2007, in only 4 years. Similar findings were referred to in a Goldman Sachs study, where the natural decline rate for 15 major oil companies rose from 10.6% to 13% in the space of 5 years (2001 to 2006). Given that 2030 is still 22 years off, it looks unlikely that natural decline rates will only grow by 1.5% in this time span.

Supply growth other than crude oil

In addition to 19 mbpd from fields not yet found the IEA relies on global NGL production to rise by almost 9mbpd, or almost 100%. This will require a massive growth in gas production. A large percentage of the gas reserves are also tied to oil in the form of associated gas. If that oil is not produced in larger volumes and at higher gas-to-oil ratios, that NGL will also not materialize. In offshore fields it is often difficult to produce the gas so that gives you more stranded gas. In recent years, the IEA has also shown the same tendency to overstate next year’s production of Opec LNG (in their July forecast for next year). This has become a pattern. The 9mbpd growth is a huge number and a shortfall could be very damaging to global supply.

Unconventional oil

In the report IEA assumes that oil from tar sands will grow with 4.7 mbpd, GTL (gas to liquids) with 0, 7 mbpd and CTL (Coal to liquids) 0.7 mbpd. The report is also very focused on carbon emissions and climate change. Yet a very material portion of net growth in the period comes from an extraction process which releases huge volumes of CO2, in addition to consuming large volumes of NG as process energy. This gives a very unfavorable net energy ratio, as well as all the other environmental challenges tar sands represent (e.g., water use). To simply assume all these political challenges will be solved in order to expand oil supply seems optimistic.

As to GTL and CTL they are not very significant by 2030 (1.4 mbpd) but clearly represent huge CO2 challenges and net-energy considerations which may stop or slow these efforts.

Future supply

On page 267 one will find a table showing expected non-Opec conventional production in 2030. The US will only loose 400.000 bpd in production over the next 22 years even though the US lost 800.000 bpd over the last 7 years. Canada will only lose 200.000 bpd and Mexico will only loose 500.000 bpd from 3.5 mbpd in 2007 in spite of Cantarell being in a tail spin. China’s super-giant Daquing is now in decline but still that country will only loose 200.000 bpd. It is of course impossible to claim that “one knows better” than all the experts who have produced this model, but a decline in production of such a small magnitude does look quite optimistic.

As far as OPEC is concerned there must be an assumption of political peace built into the model. Iran has not been able to grow their production for years in spite of all efforts. Now they will grow to 5.4 mbpd by 2030. Obviously Mr. Ahmadinejad or anybody like him will no longer be in office. Iraq will reach 6.4 mbpd and Kuwait 3.3 mbpd in spite of doubtful reserves. Nigeria will grow from 2.3 mbpd to 3.7 mbpd. A deal will apparently have been made with insurgents in the delta. And, most importantly, no other political problems affecting oil production will arise by 2030. Political turmoil is hard to predict, but we must assume something bad will happen which makes these figures less likely.

Saudi Arabia is being assumed to produce 15.7 mbpd although they have never promised to do so. Sadad al Husseini, former head of E&P in Saudi Aramco, has said the Saudis should not produce more than 12 mbpd if they want to avoid damaging their reservoirs. He has also said that Middle East OPEC will never produce more than 25 mbpd. Yet IEA projects that these countries will produce 37.1 mbpd by 2030. There is clearly a downside risk of some magnitude.

Summary

This report has been criticized by some of the peak oilers for not being alarmistic enough in its conclusions. In a way that is unfair. You cannot expect the IEA to shout “Fire in the theater!” They lay out the facts in Chapters 10 and 11. There you can see the assumptions being used and you can make up an educated assessment as to whether they are all realistic.

Are all the various data for decline rates indicating that they will accelerate with more than 1.5% in 22 years? They probably will.

Is it realistic to assume that all geopolitical tensions today affecting oil production will be solved and no new conflicts will arise by 2030? Clearly not.

Is it realistic that we will bring on 19 mbpd of production from fields we have not yet found ? Probably not. Is the USGS study realistic? Definitely not.

Is it realistic that non-Opec production will stay more or less flat and all the unconventional will roll in place unopposed in this world of climate change ? Probably not.

In short, the IEA has given us the tools to analyze and draw our own conclusions. Knowing the driving forces behind this report, this is only the beginning of their valuable work. On the shoulders of their report it is up to others, like us, to shout: “Fire in the theater!”

Posted in Energy, Oil | Comments Off on Depletion Rate Articles and Posts

Coal: why it can’t easily substitute for oil

In a major 2009, 737 page landmark study of our energy predicament, the National Academy of Sciences proposes  that the only possible near-term solution to a substitute transportation fuel to replace gasoline is liquified coal.   Liquified coal is the only possible substitute for oil since biofuels are both ecologically destructive, too small in amount to make a dent in our need of fuel, and probably use more fossil fuel energy to create than what’s returned in the final product.

1) But we’re at Peak Coal now:

  1. R. Heinberg. The End of Cheap Coal. Nature 468. 18 Nov 2010.
  2. T. Patzek. A global coal production forecast with multi-Hubbert cycle analysis.  Energy
  3.             35 (2010) 3109-3122
  4. R. Heinberg. Blackout. Coal, Climate and the Last Energy Crisis. 2009
  5. A. Friedemann. Peak Coal is already here or likely by 2020 — if true — IPCC 100 year projections too high? 2013.
  6. New York Academy of Sciences. Full cost accounting for the life cycle of coal. 2011 pp 73-98

2) Coal doesn’t contain as much energy as oil. It’s fifty to two hundred percent heavier than oil per unit of energy generated, which makes it far more energy-intensive to transport.  1,000,000 Btus = 90 pounds of coal = 8 gallons of gasoline. 1 trillion btus: = train 4 1/4 miles long = 8 million gallons of gas

3) According to David Goodstein, professor of Physics at Caltech and author of Out of Gas: the End of the Age of Oil: “We use about twice as much energy from oil as we do from coal, so if you wanted to mine enough coal to replace the missing oil, you’d have to mine it at a much higher rate, not only to replace the oil, but also because the conversion process to oil is extremely inefficient. You’d have to mine it at levels at least five times beyond those we mine now—a coal-mining industry on an absolutely unimaginable scale.”

4) Turning even more heavily to coal will accelerate global warming and sudden climate change.

5) Coal is lumpy — you can’t pour it into your gas tank.

6) Liquefying coal takes half the energy contained in the coal.

7) Coal liquefaction requires huge plants that are as expensive to build as oil refineries (no new refineries have been built in the United States for thirty years). Where will the capital for this come from?  It also requires enormous volumes of water, which is short in many regions of the country.

The National Academy of Sciences recommends liquified coal and biomass plants be built immediately to cope with declining amounts of fossil fuels in a 737 page report (NAS 2009). Yet even with a 20% average annual growth rate to 2035, when 280 plants would be in place, only 2.5 million bbl/d of gasoline equivalent would be produced (we burn 21 million bbl/d). This would consume about 300 million dry tons of biomass and about 250 million tons of coal per year.

Since we have no idea how to store carbon (CCS), it is just ghastly that in the end that we will probably go ahead anyhow because it is just a temporary stop-gap measure, when clearly there is no other technology that will ever step in to replace fossil fuels.

8) We barely have the rail infrastructure to get coal to electrical generation plants. Currently 40% of train cars carry coal. Even if the train network were increased, there is a limit to how many trains can physically be brought to a coal mine.

9) When coal is burned in coal-fired power plants, coal emits more radiation than nuclear power plants. The acids released are ruining farmland and forests. Coal also emits arsenic, sulfur, and mercury, which is why you can only eat fish a few days a month across the lower 48 states.

10) There is a notion that we have hundreds of years of coal to burn, but if we turn mainly to coal provide liquid fuel (it already accounts for half of our electricity generation), then we have about fifty years of coal left (a lot less actually if you read the peak coal articles in #1 above), and even less than that if our use of it and our population continues to grow exponentially.

11) We’ve already mined the best and most accessible coal. The deeper we dig, the greater the minimum energy requirements. Since the best quality and most accessible coal were mined first, more and more energy is required to mine and refine increasingly poor quality resources.

12) Mining coal is tremendously destructive to the environment.

13) Liquefied coal (CTL) is a water guzzler, requiring 3 barrels of water for every barrel of coal.

14) We don’t know how to sequester carbon dioxide with the certainty that it won’t escape back into the environment. The space to sequester carbon dioxide is limited, and if the plan is to inject it into geologically stable oil wells, the cost of running pipelines from the power plant might be prohibitively expensive both energy and dollar-wise.

15) CTL might make people foolish enough to think we can continue on the way we have been, and not make changes in our lives.

16) Clean coal is a mirage.Here’s an October 2013 article about where clean coal stands today:

My summary of Joe Romm’s Carbon Capture And Storage: One Step Forward, One Step Back

It’s a public relations mirage. The reality is that the scale of technology required to capture and bury the CO2 from all the coal power plants in the US would be roughly equivalent to the scale of the entire oil and gas industry in North America.

Imagine the cost and the investment required to produce that size of infrastructure. Not to actually produce more energy, but simply to mitigate some of the environmental impacts from current energy production.

Obviously that will add to the cost of electricity. It only begins to make sense if we assume that coal is going to be cheap from now until kingdom come, which is a false assumption. China’s coal consumption has been rising at about 8% per year for the past few years. China is starting import coal. China would like to import coal from the United States. What this means is that coal is going to be less affordable globally as time goes on and that means that extra cost from carbon capture and storage simply cannot be borne because of the high cost of coal. The reality is that as coal costs increase, almost any other source of electricity–even solar–will be cheaper by comparison than clean coal. Clean coal is a technology without a future (Heinberg).

17) It’s hard to finely control the burning of coal, unlike oil, and coal-mining machinery and transportation runs on oil-ased fuels, not coal.

Heinberg, Richard.  6 Jan 2012. Heinberg, Kunstler, Foss, Orlov & Chomsky on A Public Affair WORT FM (89.9) in Madison, WI.

South African Sasol produces 165,000 barrels per day of liquified coal for transportation, and also converts natural gas into synthesis gas which is converted into diesel and gasoline by the Fischer-Tropsch process.

 

Coal is what enabled the “Industrial” Revolution (Source: adapted from Wrigley, E.A. (2010), Energy and the English industrial revolution, Cambridge University Press.)

 

 

The blue part of top bar is a fantasy, hydrogen is not a solution or energy resource, but otherwise, this is a good picture of the evolution from coal to oil

Posted in Coal, Energy | Comments Off on Coal: why it can’t easily substitute for oil

Oil

Since oil is so fabulous, why not just drill for more? Economists don’t believe that there is a finite amount of anything, all you have to do is drill a hole, pour money into it, and Voila! – black crude flows out. When a resource is scarce, the Market goes out and finds more. And people thought Cargo Cults were crazy…

Energy is the “master resource” because it unlocks access to all other resources, not only powering heavy extractive equipment but involved from the very beginning of crushing rock to mine metals, make machines, cement for roads — it’s the main energy source (99%) for the transportation network.  It’s an essential component of over half a million products AND used to make those products.

Science magazine had an article stating that oil had peaked in 2005, the International Energy Agency believes energy peaked in 2006.  These are tantamount to announcing that 4 centuries of fossil fueled growth — the Industrial Age — was ending.  Yet there was no panic in the streets or  on Wall Street

So-called renewable energy sources such as solar PV depend on oil from start to end of their manufacturing, so other alternatives will never be cheaper than oil, or possible without it.

Oil actually costs hundreds of dollars per gallon when you factor in how much we spend on our military to secure it.  Retired military officers wrote a 62 page report on this , called “Powering America’s Defense: Energy and the Risks to National Security,” a followup to a 2007 report called “National Security and the Threat of Climate Change.”

Even if the oil industry had five hundred quadrillion dollars, there simply aren’t enough knowledgeable people to hire – they were all fired during the oil bust of the eighties, and now over half the current engineers and drilling rig employees are nearing retirement. And there aren’t enough drilling rigs. The average age of the existing rigs is older than when they’d usually be retired – they’re rusting and need to be replaced. And the overall infrastructure may be in bad shape, as the recent news of BP having to shut down its Prudhoe Bay pipelines due to corrosion.

Oil is exactly what you’d “invent” if you could — it remains a liquid even at -40°C and has a boiling point over 60°C.  It’s denser with energy than wood or coal, and easy to handle, store, transport (via pipelines), and deliver quickly to the customer.

Oil is refined into many products.  This Mother Jones article explains how this is done: What’s in Crude Oil and How Do We Use It? A guide to how crude oil turns into useful fuel for cars, jets, and more.

$$$ flow rate, ELM model, etc

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Biofuels can be explosive

Oil and natural gas can be cheaply distributed by pipeline, but ethanol must move by very expensive truck or train.

6 Feb 2011. Ohio train derailment prompts evacuations. CNN.

7 Oct 2011. Freight Train Derailment in Illinois Prompts Evacuations.   Associated Press

5 Aug 2012. Train derailment causes explosions near Plevna in SE Montana. KTVQ (Billings)

12 July 2012. Johnny Kelly. Ohio derailment explosions, fire sparked from thousands of gallons of ethanol.The Examiner.

National Transportation Safety Board investigators have begun searching for clues to the 98 train car derailment that caused spectacular explosions in Ohio’s capital. 90,000 gallons of ethanol exploded (in 3 thirty-thousand gallon tank cars).  Exploding freight cars full of ethanol made for a dramatic early morning scene in Ohio’s capital on Wednesday. The explosions were felt for blocks and sent flames shooting high in the air.

Officials say the explosions and fire following a large train derailment in Ohio early on Wednesday occurred as a result of thousands of gallons of ethanol.  The contents of the rail cars were allowed to burn much of the day on Wednesday because of the potential environmental hazard of using the foam to put the chemical fire out.

Fowler said dousing an ethanol fire requires a special foam that carries environmental risks, and crews feared that extinguishing the remaining fuel might produce a build-up of fumes and lead to another explosion.

Roughly 29.4 million carloads of freight are hauled every year across 140,000-plus miles of rail in the United States, she said. Of that, 1.8 million carloads are categorized as varying hazardous materials. Last year, about 325,000 carloads of ethanol were hauled over those lines.

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Outsmarting smart growth. Population Growth Key Reason for Sprawl

OUTSMARTING SMART GROWTH – Population Growth Key Reason for Sprawl

WASHINGTON (August 26, 2003) — In recent years, many local governments, states, and non-profit groups have adopted initiatives to save rural land from sprawl. Most anti-sprawl efforts have focused on “Smart Growth,” which emphasizes better planning to create more efficient land use.

A new study from the Center for Immigration Studies finds that this approach will have limited success in saving rural land because it fails to address a key reason for sprawl — population growth. Based on data from the Census Bureau and the U.S. Department of Agriculture’s Natural Resources Conservation Service, the study shows that about half the loss of rural land in recent decades is attributable to increases in the U.S. population, while changes in land use account for the other half.

New immigration and births to immigrants now account for nearly 90 percent of U.S. population growth. Therefore, population growth, and the immigration policies that drive it, must become an integral focus of efforts to preserve rural land.

The 122-page report, entitled “Outsmarting Smart Growth: Population Growth, Immigration, and the Problem of Sprawl,” contains detailed information for every state and is available at http://www.cis.org/articles/2003/sprawl.html

Among the report’s findings:

* Department of Agriculture data collected between 1982 and 1997 show that in states with less than 10% population growth, developed land expanded 26% on average, compared to a 46% expansion of developed land in states that grew in population by more than 30%.

* On average, each 10,000-person increase in state population resulted in 1,600 acres of undeveloped rural land being developed, even controlling for other factors such as changes in land use per person.

* Nationally, population growth accounted for 52 percent of the loss of rural land between 1982 and 1997, while increases in per-capita land consumption accounted for 48 percent.

“Immigration-driven population growth is out-smarting Smart Growth initiatives by forcing continued rural land destruction,” said Roy Beck, Executive Director of NumbersUSA Education and Research Foundation, and lead author of the report. “Smart Growth programs in the face of rapid population growth will require increasingly onerous government regulation; without such population increases, artificially imposed by the federal government, Smart Growth policies would not only be more successful, they will also encounter less public opposition.”

Among other findings in the report:

* Smart Growth must also play a significant role in anti-sprawl efforts because per-capita land use has been increasing. Between 1982 and 1997, land use per person in the United States rose 16 percent.

* There is significant variation between states in the factors accounting for sprawl. For example, population growth accounted for more than half of sprawl in five of the 10 states that lost the most land, while increases in per-capita land use accounted for more than half of sprawl in the other five worst sprawling states.

* An examination of the nation’s largest urban areas reveals the same pattern as in the states.  Census Bureau data show that between 1970 and 1990, population growth accounted for slightly more than half of the expansion of urbanized land in the nation’s 100 largest cities.

* In the 1990s, new immigration and children born to immigrants accounted for most of the 33-million increase in the U.S. population. Census Bureau data from 2002 indicate that the more than 1.5 million legal and illegal immigrants who settle in the country each year, along with 750,000 yearly births to immigrants, are equal to 87 percent of the annual increase in the U.S. population.

* Contrary to common perception, about half the country’s immigrants now live in the suburbs. The pull of the suburbs is even greater in the second generation. Of the children of immigrants who have settled down and purchased a home, only 24 percent have done so in the nation’s central cities.

* The suburbanization of immigrants and their children is a welcome sign of integration. But it also means that they contribute to sprawl just like other Americans.

WHAT’S DIFFERENT ABOUT THIS STUDY: Most studies in this field, as well as the work of most anti-sprawl organizations, have not focused on the actual destruction of undeveloped rural land. Instead, they have evaluated the density of new development or the use of various urban-planning techniques. While such studies are valid for analyzing various aspects of sprawl, they have the distinct disadvantage of largely disregarding the loss of agricultural land and natural habitat, because all of the emphasis is on the quality of the planning or the density in the new development.

By examining the actual loss of undeveloped rural land, this study avoids this problem. Our findings show that population plays an enormous role in driving sprawl. Thus, stabilizing the U.S. population must become a central goal of anti-sprawl efforts. Since Americans already have only about two children on average, the primary reason for the country’s ever-increasing population is immigration. If we wish to deal effectively with sprawl, then immigration levels will have to be reduced.

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Carrying Capacity, web sites, and articles

Definition of Carrying Capacity

Carrying capacity refers to the number of individuals who can be supported in a given area within natural resource limits, and without degrading the natural social, cultural and economic environment for present and future generations. The carrying capacity for any given area is not fixed. It can be altered by improved technology, but mostly it is changed for the worse by pressures that accompany a population increase. As the environment is degraded, carrying capacity actually shrinks, leaving the environment no longer able to support even the number of people who could formerly have lived in the area on a sustainable basis. No population can live beyond the environment’s carrying capacity for very long.  http://www.carryingcapacity.org/

United States carrying capacity:

  • 100 million. David Pimentel “Population Politics” by Virginia Abernethy (2000)
  • 250 million. Vaclav Smil  “Enriching the Earth: Fritz Haber, Carl Bosch, and the Transformation of World Food Production” (2000)

Carrying Capacity by Nation

Global Footprint Network.  Find out the latest figure for your nation.

2007. List of countries by ecological footprint. Global footprint network.

page 10: the carrying capacity of many nations:  10 March 1997. Mathis Wackernagel, et. al. Ecological Footprints of Nations. How Much Nature Do They Use? — How Much Nature Do They Have? Centro de Estudios para la Sustentabilidad, Universidad Anáhuac de Xalapa. In 1997 the nations that were NOT over carrying capacity were Australia, Canada, Chile, Finland, Ireland, New Zealand, Sweden.

Carrying capacity websites

Australia Carrying Capacity Dashboard

Redefining Progress Ecological Footprint

Read more about Carrying Capacity

Anca Novacovici. 12 Nov 2012. Peak Oil? What About Peak Food? A Conversation With Lester Brown. Huffingtonpost

Now here’s a real tragedy — the end of coffee!  7 Nov 2012. Arabica Coffee Could Be Extinct in the Wild Within 70 Years. ScienceDaily

Population Matters Organization

William E. Rees, The University of British Columbia.  Revisiting Carrying Capacity: Area-Based Indicators of Sustainability

State of Florida carrying capacity. Floridians for a Sustainable Population.

1 May 2000. Mark R. Elsis. Subject: We Have Passed Sustainability. overpopulation.net

24 June 2002. Christopher Doering. Study: Earth Can’t Meet Human Demand for Resources. Reuters.

16 May 2007. Professor François Cellier. Ecological Footprint, Energy Consumption, and the Looming Collapse. theoildrum

3 May 2007. Special guest: Dr. Russell Hopfenberg on food supply, carrying capacity, and population.

Russell Hopfenberg and David Pimentel. 6 Mar 2001. Human Population Numbers as a Function of Food Supply.

Human Carrying Capacity is Determined by Food Availability. Population and Environment, Vol 25 #2 109-17.

Population growth

365,000 new babies every day.
78 million a year

World population growth (Time of Christ)
150 million in 1    AD
300 million in 1350 AD
600 million in 1700 AD

World population growth (Last 200 years)
1 billion in 1804
2 billion in 1927
3 billion in 1960
4 billion in 1974
5 billion in 1987
6 billion in 1999

World population (projected growth)
2010 = 6.9 billion
2020 = 8.0 billion
2030 = 9.3 billion
2040 = Over 10 billion

The USA is the biggest consumer of oil. We burn up 20 million barrels
every day. The world consumes 75 million barrels a day. In other
words, the US with a population share of 5% consumes 27% of the world oil supply.

World energy supply comes from these primary sources:
Oil         40%
Coal         26%
Natural Gas     24%
Hydro          3%
Nuclear      7%

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When Life Nearly Died. The greatest mass extinction of all time

[ Benton shows why it was probably lava flows, not impact from meteors that caused the Permian extinction.

I don’t know why everyone isn’t reading whatever they can find on the greatest mass murder of all time — the Permian Extinction.  Especially since we humans are causing a 6th mass extinction.  Will ours be as big as the Permian?  It will be if we burn as much fossil fuels as were contained in the Siberian traps I would guess.  But if we don’t have an equal amount of fossil fuels, will fossils still do as much harm because they’re being burned orders of magnitude faster, before life has enough time to adapt? 

When I read this book I was hot on the trail of trying to figure out if methane (gas) hydrates might be the murder suspect.  But Benton twice says no: 1) The end-Paleocene methane burp did not lead to a major extinction event, and 2) the gas hydrates were probably not the main killer at the end of the Permian. Though he does see methane burbs as an accomplice: “the release of gas hydrates added to the misery”.

I am still trying to figure out if there is a methane apocalypse in our future.  There is mounting evidence that it may not be.  But not nearly enough research has been done, so I’ll continue to follow the murder mystery as the story unfolds.  I’ve put arguments against a methane apocalypse happening in the future in the post “Methane hydrate apocalypse? Maybe not…”.

In addition, peak conventional oil production peaked in 2005 and so decline is likely within 10 years as unconventional fails to keep up with the exponentially increasing decline rates of the 500 Giant Oil Fields that provide over half of our oil. We are also at or near peak coal.  And close to peak natural gas. That means there may not be enough fossil fuels left to reach the worst-case IPCC scenarios (RPC 8.5).  Many geologists think a max of IPCC RPC 2.5 is most likely.  That will be bad, but maybe not Permian extinction bad!  

Alice Friedemann   www.energyskeptic.com  author of “When Trucks Stop Running: Energy and the Future of Transportation, 2015, Springer]

Benton, Michael J. 2003. When Life Nearly Died. The greatest mass extinction of all time. Thames & Hudson.  EXCERPTS FOLLOW:

140 DIVERSITY, EXTINCTION AND MASS EXTINCTION

The astronomers enthusiastically polished their telescope lenses and pointed them skywards in search of Nemesis, Planet X or tilting galaxy edges. Geological supporters of periodicity went out to find evidence for massive impacts at mass extinction boundaries to match the physical evidence that had already been established for the KT event. But the critics of periodicity argued that each mass extinction was a one-off, and that there was no linking principle. The 26 myr. cycle discovered by Raup and Sepkoski was, they argued, a statistical artifact or the result of limited data analysis.

So what is the current view of periodicity? I think that most paleontologists and geologists have just quietly let it drop. Close analysis of the fossil data has failed to confirm periodicity Indeed, scrutiny of some of the extinction peaks in Fig. 19, such as the three in the Jurassic, has suggested that these are largely artifacts of the data collecting. Also, the searches for Nemesis and Planet X have not been successful; nor has the search for indicators of impact at the time of the other identified mass extinctions. Iridium, shocked quartz or craters have been found for only two or three of the ten postulated mass extinction peaks that are elements of the periodic cycle, but this evidence is feeble in the extreme when compared to the manifold lines of evidence for impact at the KT boundary.

Periodicity of mass extinctions was an intriguing idea, but it has been almost conclusively rejected now. But that does not mean that one should not take an overview of all the extinction events of the past in search of common factors.

Scaling and taxonomic targets

Extinction events of the past vary in magnitude, and they may usefully be sorted into major, intermediate and minor events, based on their magnitudes. The end-Permian mass extinction is in a class on its own, since it is known that 6o-65% of families disappeared at that time, and this scales up to a loss of 80-95% of species. The four intermediate mass extinctions are associated with losses of 20-30% of families, and perhaps 50% of species. The minor extinction events experienced perhaps 10% family loss and 20-30% species loss, but these cannot be called mass extinctions.

184 LIFE’S BIGGEST-CHALLENGE

amazing array of special devices – broad flanges, spikes, gas-filled balloons – that stop them from sinking; some have spiral body shapes so that they spin slowly They include many unique groups that spend their entire lives in that form, while others are the larvae of typical marine animals, such as crabs, sea urchins or corals, that will eventually metamorphose into their adult forms. The plankton form the base of all food chains in the sea. They are eaten by shrimps, fishes and other larger animals, and these in turn form the diet of larger fishes, sharks, seals and whales.

Kill the plankton, and you kill all life in the sea.

The radiolarians, delicate net-like little organisms with a light skeleton generally made of silica (silicon dioxide, the main component of sand and of flint), today feed on bacteria and plant-like plankton. Their skeleton is made up of tiny spicules, or needles, of silica, forming perforated spheres, some with spikes, just like miniature Christmas decorations. Others are like tiny string shopping bags, suspended from a single corner. All are perforated with numerous regular holes. When they die, the flinty little skeletons of radiolarians rain down on to the deep ocean floor where ‘ they accumulate slowly, at only 4 or 5 millimeters per 1000 years. Nevertheless, over millions of years, radiolarian oozes have solidified into cherts, glassy pure-silica deposits, that currently make up about 3% of the modern ocean floor.

In Late Permian deep marine rock successions, radiolarian cherts are found quite commonly in China, Japan and Canada, but then disappear completely at the end of the Permian, only to reappear in the Mid Triassic, some 8 million years later. This ‘chert gap’ is matched by the virtual annihilation of all species of radiolarians at the end of the Permian – an event that is particularly striking since otherwise the radiolarians had had a singularly uneventful history for the previous 450 million years. It takes some enormous environmental shock to kill off such minute planktonic organisms that must have been present as millions of millions of individuals all over the world. Far easier to kill off large and less numerous animals such as dinosaurs.

Another element of the plankton today are the foraminifera. Foraminifera look like tiny spiral or coiled snails, with a shell made from calcium carbonate (calcite) or glued sand grains, enclosing their single-celled soft parts. The shell may form a tall spiral, a flat coil or disc, or a mass of small globules, in each case being divided into a number of internal

chambers. In the Permian all foraminifera were sea-bed dwellers, feeding themselves on the rain of organic matter and plant-like plankton that sank from the surface. The dominant foraminiferan group in the Permian were the fusulines. Their shells were made from many tiny crystals of calcite. Some of them reached as much as 10 centimeters in length -most unusual for such a single-celled animal. The fusulines flourished in the Permian, evolving fast and giving rise to over 2000 species. Indeed, they evolved so fast, and achieved such diversity, that they are used as important guide fossils for dating Permian marine rocks. Then they all disappeared.

Until recently, the die-off of the fusulines was thought to have lasted for most of the second half of the Permian, some 20 million years or more. It was said to have been a gradual die-off, perhaps linked to long-term climatic deterioration. But new work has shown that the early studies had been too limited, and had relied on a literal reading of the record. The problem was backward smearing, the Signor-Lipps effect, as noted above (Chapter 7).

A recent study of the Permo-Triassic boundary in Austria by Michael Rampino and Andre Adier, both of New York University, has shown on the basis of very detailed collecting that most fusuline species did indeed go extinct right at the Permo-Triassic boundary. Other fusuline species dis-appeared from the rock record as much as 16 meters below the boundary, which could be taken to imply a long-term die-off. However, these species were rare forms, known only from small numbers of specimens. Rampino and Adier argued that these were misleading datum points: the disappearances do not indicate extinctions. If these rare forms had been commoner, they would probably have been sampled up to the Permo-Triassic boundary as well. As mentioned before, with a patchy fossil record, it is unlikely that palaeontologists will ever find the very last member of a particular species to have lived on Earth. If a hundred species died out in an instant, the fossil record might still paint a picture of long-term gradual disappearances. Rare forms are especially liable to this phenomenon of false early disappearance, the Signor-Lipps effect.

Not all foraminifera died out during the end-Permian crisis. The generally large fusulines had completely crashed out of sight. But survivors included mainly smaller forms and some flattened species that burrowed in the sea-floor sediments feeding on detritus. A characteristic feature of these, and other survivors, is that they may have been adapted to living in conditions of low oxygen. Perhaps this is a clue to the nature of the environmental stresses at the end of the Permian.

Reefs

Reefs were common in Permian shallow tropical waters. For example, huge reefs developed over much of west Texas and New Mexico. During the Mid Permian, as the tropical seas became deeper, reefs built up around the edge of the ancient Delaware Basin, reaching a height of some 600 meters. Just like modern coral reefs, the living corals and other animals, were in the upper parts of the reef, keeping in close touch with the sea surface which allowed the associated plant-like organisms to photosynthesize. Deeper parts of the reef were formed from overgrown, dead coral skeletons, as well as shells and other reef rubble.

Reef life then was hugely diverse, with hundreds of species living in close proximity. The framework of the reef was built from sponges, corals and bryozoans, animals that secrete a stony skeleton in which they live. Living on the dead corals were various clinging molluscs and worms. Creeping among the coral fronds were snail-like molluscs, sea urchins, starfish and shrimps. And swimming above were jet-propelled nautiloids and ammonoids (relatives of squid and octopus), swimming arthropods and fishes of various kinds. Just as today, Late Permian reefs were diversity hotspots – locations of unusual species richness.The seas have retreated now of course, but the west Texas landscape has not changed much in the past 100 million years. The visitor today can essentially stand on the Late Permian sea bed and look around at the towering Guadalupe Mountains, made up of reef limestones, termed the Capitan Limestone Formation. The vast size of the reef, hundreds of meters thick and 400 kilometers long, is immediately clear, and the richness of Mid Permian tropical reef life is evident. Such large and richly diverse reefs are also known from China right to the end of the Permian.

Reefs were entirely wiped out by the end-Permian event. Like the ‘chert gap’, there is a ‘reef gap’ lasting for some 7 or 8 million years in the Early Triassic. Many sponge groups survived apparently unaffected through the end-Permian crisis, but others, especially those associated with the tropical-belt reefs, were decimated.

187 LIFE’S BIGGEST CHALLENGE

The corals were even harder hit. Throughout the preceding 200 million years, limestone deposits of tropical zones are absolutely teeming with the skeletons of rugose and tabulate corals. Any novice fossil collector will have accumulated dozens of specimens of these corals – the tiny ice cream cones of small, solitary rugose corals and the fist-sized, rounded tabulate coral colonies composed of dozens of regular, honeycomb-like or star-shaped chambers. Some are even shaped like a bursting sun – hence the name of the coral, Heliolites, the ‘sun rock’. Solitary corals built them-selves tubular houses from calcite which they laid down round and round their soft bodies as protection from predation. Their tubular houses range in size from a few millimeters long to the vast meter-long cones of Caninia in the Carboniferous. Mostly they were fixed upright on to rocks or other hard materials on the sea bed.

Colonies of rugose or tabulate corals are among the most beautiful of fossils. Colonies arose when one progenitor coral animal cemented its skeleton down to the seafloor, and then set about building its stony dwelling chamber. By endlessly splitting, the original coral animal formed numerous identical clones of itself, each of which constructed a little chamber. There is economy in such an arrangement, since each subsequent coral animal has to build only a few side walls and can use the pre-existing parts of the colony. In the end, most colonies formed bulbous, cabbage-shaped structures or broad plates on gradually expanding trumpet-like stalks. Each coral animal kept itself free of the others, and fed by capturing food particles on sticky tentacles. If danger threatened, the coral animals withdrew deep into their stony houses.

The rugose and tabulate corals, which had been the mainstay of reef formation worldwide for 200 million years of the Palaeozoic, all died out at the end of the Permian. It seems that they had undergone a long-term decline before the very end. First to go were the massive colonial forms, and at the end it was the turn of the colonies made from less intimately intergrown tubes and the solitary forms. The early losses of some coral groups seem to relate to changing habitats. For example, the warm tropical seas that had covered Texas and New Mexico had withdrawn in the Late Permian. This was not part of the crisis, merely a change in sea levels and continental positions. Where coral reefs are found in the latest Permian, however, such as in South China, the corals survived right to the end.

190 LIFE’S BIGGEST CHALLENGE

Of course, had this not happened – if, for example, the tiny numbers of species that squeezed through the bottleneck from the Permian to the Triassic had actually all died out – the effects would have been negative. But then it would have been a total wipeout, pure and simple.

Shellfish

First-year geology students always complain about having to learn the groups of fossils. One of the key facts they have to grasp is the difference between brachiopods and bivalves. These are two distinct groups of shelled animals which have different ancestors, but which look superficially similar. A brachiopod consists of two shell halves, more properly called valves, that enclose and protect the animal inside. The shell is fixed to the seabed by a tough thread that emerges from the tip of one of the valves. The two valves are joined along the hinge line, and they may be opened by muscular activity to allow food particles to be sucked in and waste material expelled.

It is easy to tell a brachiopod from a bivalve: brachiopod valves are different in dimensions, while those of bivalves are identical mirror-images. One valve of the brachiopod is larger than the other, and it is often shaped like a Roman oil lamp – teardrop-shaped, with the extension at the hinge-end often perforated by a large circular hole for passage of the attachment thread (just like the hole for the wick in the Roman oil lamp). The other valve is circular and smaller. Bivalve valves, on the other hand, generally fit exactly over each other, being identical in size.

The brachiopods and the molluscs of the Permian were hit hard by the mass extinction. Molluscs, such as clams, oysters, mussels, whelks, octopus and squid, dominate the seafloor today, while brachiopods are relatively rare, being found only in rather deep waters and confined to certain parts of the world. However, the situation was the reverse in the Palaeozoic, and the end-Permian crisis perhaps has a large part to play in engineering the switchover.

To human eyes the brachiopods may seem pretty limited in their potential – all they really do is sit on the seabed opening and closing their valves. They feed by sucking water, plus food particles, into their shells, passing it over a looped filtering organ, the lophophore, and blowing water out the other side. However, the Permian was a time of astonishing innovation in the group. The cone-shaped rich thofenids copied the corals, cementing themselves to a rock or another shell with the tip of the cone and standing upright in tight clusters to form mini-reefs. The smaller valve had become simply a small lid, like that of a pedal bin, which could be opened to allow feeding. The fat, and often large, brachiopods also flourished in the Permian, when remarkable new spiny forms appeared. The spines were delicate tubular structures sprouting wildly all over the base valve, and these extraordinary brachiopods must have used them to anchor themselves in soft, muddy seafloors. So these two successful groups had conquered new habitats and modes of life, and who knows where the brachiopods might have gone but for the mass extinction.

The brachiopods were devastated by the end-Permian event. At the level of superfamilies, 10 out of 26 disappeared, which doesn’t seem too bad (it equates to a loss of 38%). However, at the level of families, jo out of^-j died out (91% loss). It has been estimated that some pj% of genera of brachiopods were hit by the extinction, and that equates to about 99% of species. So all but a tiny handful of this hugely diverse and abundant group bit the slime.

In contrast to this collapse of the brachiopods, some of the molluscs weathered the end-Permian crisis much better. There are three main groups of molluscs: the bivalves (‘two valves’), gastropods (‘stomach foot’) and cephalopods (‘head foot’). The origins of the last two of these names are rather startling. Gastropods do indeed have a stomach in their foot, but their foot is actually^ almost their whole body. Technically, the soft slimy portion of a snail or whelk that creeps over the ground is the foot, but obvi-ously the whole body of the animal, from eye stalks at the front to anus at the back, is enclosed in the foot. Cephalopods include the octopus and the squid, as well as the fossil ammonoids with their coiled shells. The ‘head’ is the front portion with its huge eyes and ring of massive tentacles that haul food towards the mouth. The ‘foot’ consists of the tentacles and a siphon that can squirt water or black ink for rapid jet propulsion and confusion of an enemy. So, technically, the head and foot are closely associated, and the ‘body’ of the ammonoid, or of the octopus, is a bag-like structure containing the stomach and guts.

Most families of bivalves passed through the event relatively unscathed, with only three out of 40 disappearing. Bivalves in the Late Permian were rarer elements of the seabed faunas than were the

249 ON THE RIVER SAKMARA

As we raced around the South Urals we saw site after site, each of which had produced some skeletons of amphibians and reptiles. We found the mass of new information hard to take in, and asked if anyone had actually done a census of the rise and fall of the different animal groups through time. Indeed, Valentin told us, he had compiled a huge catalogue of all the sites. When we returned to Saratov with him after the expedition, an interesting journey of 700 kilometers in the front of a huge Gaz 66 truck, Valentin showed us his card index. In it, 400 or so sites are listed, each with a determination of its geological age and a list of the fossils that had been found there.

A big job for the future will be to work with our Russian colleagues to translate the card index, and plot the information it contains about the rise and fall of reptiles across the Permo-Triassic boundary. A preliminary scan of the information suggests that the pattern is just the same as in South Africa – a catastrophic drop in diversity, followed by a long and slow recovery of ecosystems.

The final solution

So what caused this, the biggest of all mass extinctions? The nature of what happened is now much clearer than it had been, say, in 1990. Careful dating has shown that the event took place 251 million years ago, and that species losses were anything from 90 to 95%. This was no local phenomenon, since it has been detected in rocks from China to Spitsbergen, from Greenland to South Africa, from Russia to Australia. In every case, whether looking at events on land or in the sea, the rate of species loss seems to have been similarly huge. There were no safe refuges, nowhere to hide.

There is also no evidence for selectivity, except that the survivors tended to be widespread species. But with such a tiny survival rate – 10% or less of species made it through – it is clear that plants and animals were being wiped out with almost no regard to their adaptations. Certainly on land the large animals all disappeared, but this could be explained as part of a chance process. If there are 100 species, of which 10 are large, a 95% loss of species is likely to kill all the large animals. Add to that the probability that, as today, large animals are rarer than small animals (i.e. smaller population sizes), then it is easy to see why all the rhinos and elephants might disappear, but a few rats and squirrels might survive. It would be wrong, though, to say that this proves that individual rats and squirrels are better adapted to survive crises. It is perhaps only their greater abundance that protects them as a species

We have some hints of the environmental changes too. In the sea, the rocks show an increase in anoxia. Many of the surviving marine creatures seem to have been peculiarly adapted to living in such conditions of low oxygen There are hints too of low productivity, meaning a lack of organic matter in food chains, so many of the surviving species were presumably able to survive on very little food.

On land, as the recent studies in South Africa and Russia have shown, the end of the Permian is marked by a sudden change in sedimentation, with megafans composed of huge boulders. In neither case can this be explained by a dramatic increase in rainfall. Indeed, the evidence suggests increased aridity, so the dramatically heightened levels of erosion and runoff can best be explained by a sudden loss of vegetation and soils, perhaps worldwide. Soils show that climates also became warmer.

So what caused the crash? The event must have been sudden. It must have reduced oxygen levels, increased temperatures and reduced rainfall, all on a worldwide scale. It must have had the ability to push all of life virtually to the brink. The tentacles of the killing agent reached into shallow seas and into the deepest oceans. On land, they penetrated lowland basins and mountainous regions, rivers and lakes. What kind of crisis could have been so profound that it killed reptiles on land and brachiopods and corals on the sea floor?

It cleared the Earth of vegetation, even if for a short time.

This is more profound than any of the puny threats that humans have devised so far, whether nuclear bombs or mass forest clearance. A global rise in temperature of half a degree in a century as a result of industrial pollution and global warming? That fades into insignificance beside the crisis 251 million years ago.

272 WHAT CAUSED THE BIGGEST CATASTROPHE OF ALL TIME?

‘Negative feedback’ means that a process is countered by the opposite, or negative, process, so regulating the effects of the process and maintaining a steady state. ‘Positive feedback’, on the other hand, means that the process is enhanced by more of the same, with further positive processes operating in the same direction.

So with the atmosphere. Excess carbon dioxide is mopped up by plants (during photosynthesis plants absorb carbon dioxide and produce oxygen) and through weathering. Carbon dioxide is stripped out of the atmosphere by rain water, forming weak carbonic acid, which then dissolves limestones on the ground. The carbon combines with the weathering products of the limestone, and the oxygen is given off as carbon dioxide. If you drip an acid on to limestone, the limestone will fizz – this is the carbon dioxide bubbling off.

By 2001, a trendy new carbon source had been identified. And this was one that was fast. Gas hydrates are crystalline solids composed of a cage of water molecules trapping gas inside. The water cages can trap various gas molecules, including carbon dioxide and hydrogen sulphide, but the commonest gas hydrates trap methane, a gas composed of carbon and hydrogen. Gas hydrates form at water depths greater than 100 meters, and particularly in polar regions. Because of the high pressures at such depths, the gas hydrates are amazing gas concentrators; if 1 million liters of methane hydrate is brought to the surface suddenly, 160 million liters of gas can be released.

Since the 1970s, when gas hydrates were discovered, they have been identified deep in sediments around the margins of most continents, and particularly around the poles. The huge frozen masses of ice and compressed gas fill pore spaces within the sea-floor sediments, and occupy vast fields that can be detected by means of geophysical soundings.

Worldwide, it is estimated that gas hydrates contain at least 10,000 billion tonnes of carbon, about twice the amount of carbon held in all fossil fuels on earth. If some perturbation hits one of these gas hydrate bodies, and the gas is released, huge volumes of carbon dioxide or methane would bubble up through the ocean and explode from the surface, temporarily displacing the normal atmosphere above.

Could this be a killer? On 3 December 1872, the ship Mane Celeste was found adrift off the Azores. There was no sign of life on board, either above or below decks. There were no clues to explain why the crew had disappeared. Indeed everything appeared to be quite normal. In the crew’s quarters, clothing lay folded neatly on bunks and washing hung on lines; in the galley, breakfast had been prepared and some of it had been served. Could the crew have been killed by the release of a massive bubble of methane hydrate? Millions of cubic meters of methane or carbon dioxide erupting from below would have a devastating effect, but would then be swallowed up into the atmosphere, leaving no trace. Why were all the crew missing? This will never be known – perhaps the pulse from below and the stagnation of the atmosphere made them all run on deck and jump overboard in search of fresh air.

What if numerous gas hydrate bodies, all round the world, were to have been released at the same time? Evidence has now been found for such a mass gas escape, a so-called methane burp, 22 million years ago, at the end of the Paleocene. At that time there was a pulse of global warming up to 7° C over approximately 10,000 years, as shown by oxygen isotopes and the record of fossil plants. It has been suggested that this pulse of warming was caused by the release of 2000 billion tonnes of methane hydrate into the atmosphere.

The pulse of warming was brief, and conditions rapidly returned to normal. Gerry Dickens of the University of Michigan and colleagues suggests that this is good evidence that the warming was caused by gas hydrates. The rapid warming led to the death of many species, the excess organic matter from dead plants and animals was washed into the sea, and carbon dioxide levels in the atmosphere were quickly reduced by the incorporation of the organic matter into oceanic deposits and by increased weathering following the loss of plant cover.

The end-Paleocene methane burp did not lead to a major extinction event.

The effects were worldwide, and many species died out, but the Earth returned to normal soon enough, and most species recovered. Could such a model be enough to kill almost all life?

Explaining the carbon isotope spike

The gas hydrates were probably not the main killer at the end of the Permian.

But they may help to explain the massive negative shift in the carbon isotope curve, which dropped by 4 or 5 parts per thousand. This perhaps does not sound much of a shift towards the lighter isotope of carbon, but it actually represents a global shift in the entire carbon budget – the introduction of billions of tonnes of light carbon into the oceans.

What are the possibilities? The influx of isotopically light carbon could have come from the collapse of productivity that happened at the Permo-Triassic boundary, and the entry of huge amounts of rotting wood and animal carcasses into the sea. But, Paul Wignall has calculated, this would not be enough. It is estimated that the entire biomass of life on Earth today contains 830 billion tonnes of carbon. If all life is killed instantaneously, that amount of organic carbon could be washed into the sea and buried. But there are already billions of tonnes of inorganic, heavier carbon in the ocean-atmosphere system, so the addition of 830 billion tonnes would make very little difference to the ratio.

Even the Siberian Traps eruptions could not have supplied enough isotopically light carbon. If the volume of basalt produced was a million cubic kilometers, that would have produced 10,000 billion tonnes of carbon, which would have been a mixture of carbon. So, again, it was not enough to cause the carbon isotope shift. Even with the best figures, the Siberian Traps eruptions could have produced only 20% of the shift that actually happened.

Geologists have embraced gas hydrates with fervor – almost with a sigh of relief. When the calculations are done, nothing else has enough light carbon, nor can act fast enough. The carbon in gas hydrates is isotopically very light. The release of only 10% of the estimated 10,000 billion tonnes of carbon contained in gas hydrates today would be sufficient to cause the shift …the secret is the very light composition of carbon. Although the Siberian Traps may have released the same mass of carbon, its isotopic weight was much heavier, and could not have produced the observed negative spike.

The killing model Paul Wignall has put everything together into a single flow chart. The key crisis seems to have been the eruption of the Siberian Traps. Worldwide devastation was caused by the production of different gases during the eruptions, and these gases were presumably pumped into the atmosphere sporadically during the entire span of the eruptions. Perhaps a single major eruption could have been absorbed by the Earth, and the short-term disturbance of the atmosphere-ocean system corrected by normal feedback processes. But repeated eruptions may have been too much, and may have led inexorably to total collapse of all normal interactions between the physical world and life.

Four gases from the eruptions may have been to blame. Carbon dioxide had the longest-term effects, leading immediately to global warming and anoxia, which persisted for hundreds of thousands of years. Each pulse of eruption may have reprimed the effects, and prevented any normal feed-back systems from kicking into operation. The release of gas hydrates added to the misery.

Sulphur dioxide was also produced. This gas has a shorter residence time in the atmosphere, but the cooling effects of the sulphates may have caused a snap glaciation in some parts of the world, with associated falls in sea level as marine water was frozen into ice. Whether there was such a glaciation, and how long it lasted, cannot be said at present. And, as we saw above, there is limited geological evidence for freezing, but if it was short-term, as the theory suggests, one would not necessarily expect to find evidence preserved in the rocks.

Chlorine gas may also have been produced. In conjunction with the sulfates and the carbon dioxide these would produce acid rain. When combined with water, these gases form hydrochloric acid, sulfuric acid and carbonic acid, and hydrofluoric acid may also have been released. If such a delightful cocktail of acids were to rain out of the sky, normal plant life would have been devastated, just as today acid rain kills forests. With normal plants dramatically reduced, animal life on land would go too. Perhaps this postulated acid burst wiped out much of life on land and led to the fungal spike, the mushrooms and molds being the first land life to be able to recover.

Acid rain also, of course, increases the rate of normal weathering on land, and the loss of plants would make it worse as soils were stripped off. Retallack and colleagues certainly detected this in the record of soils across the Permo-Triassic boundary, and increased rates of runoff of sediment into the sea are indicated also by a shift in strontium ratios. A dramatic increase in the ratio of strontium-87 to strontium-86 across the Permo-Triassic boundary suggests that huge amounts of terrestrial material were entering the sea via rivers.

The whole end-Permian crisis may have been made even worse by a runaway greenhouse effect. Normally, the atmosphere-ocean system will correct imbalances, and return carbon and oxygen levels to normal. This is a negative feedback process. If carbon dioxide levels increase, burial of organic matter, weathering or proliferation of forests will eat up the excess gas. However, a runaway greenhouse is a positive feedback system. An increase in carbon dioxide, for example, is not countered by processes that mitigate the effect. On the contrary, it triggers processes that add yet more carbon dioxide to the atmosphere.

The end-Permian runaway greenhouse may have been simple. Release of carbon dioxide from the eruption of the Siberian Traps led to a rise in global temperatures of 6°C or so. Cool polar regions became warm and frozen tundra became unfrozen. The melting might have penetrated to the frozen gas hydrate reservoirs located around the polar oceans, and massive volumes of methane may have burst to the surface of the oceans in huge bubbles. This further input of carbon into the atmosphere caused more warming, which could have melted further gas hydrate reservoirs. So the process went on, running faster and faster. The natural systems that normally reduce carbon dioxide levels could not operate, and eventually the system spiraled out of control, with the biggest crash in the history of life.

The view from the burrow

What did all of this look like at the time? Imagine the scene in the Karoo Basin in Dicynodon Zone times, which we encountered in Chapter 9. Dicynodon itself, the medium-sized plant-eater that was most abundant at the time, may have been able to make burrows in which it could escape from the normal rigors of the tropical-monsoonal climate in which it lived. As the crisis approached, Dicynodon would have scuttled along the river bank and plunged into his cool burrow, expecting that it would all pass in a day or so and he could crawl out again.

The first basalt eruptions began thousands of years before, and far away, in Siberia, and continue, sporadically. None of the noise of the explosions would be heard in Africa, nor would Dicynodon have seen any of the erupting lava, ash or gas. But air temperatures might bounce up a little. Locally, around the eruption site, there might be a snap freeze caused by the emission of sulphur dioxide, but that would be a short-term phenomenon, soon overwhelmed by the warming effects of the carbon dioxide emission. The first eruptions pass pretty well unnoticed.

Then, a year or so later, there is a larger eruption. A further snap freeze is replaced by a greater rise in air temperature. This time Dicynodon feels it. It is the dry season, the time between the annual monsoonal rains, and it hurts. Life is balanced on a fine margin between survival and death during the dry season in any case, as we saw in Chapter 9. Even a 1 degree rise in temperature can kill off more plants than normal, and then more herbivorous animals fail to survive through to the rainy season. The blast of heat sends Dicynodon into his hole.

This time, the eruption initiates some further processes. The cocktail of gases ejected into the atmosphere rises high into the stratosphere and encircles the globe. The gases and fine dust distort the normal appearance of the heavens – sunrises and sunsets look weird, with splashes of red, yellow and purple, and this is seen all round the world. A few days later, the perturbation triggers catastrophic acid rain. The chlorine, fluorine, sulphur dioxide and carbon dioxide emitted from the volcano combine with rain water in the high clouds to produce a cocktail of hydrochloric, hydrofluoric, sulphuric and carbonic acids. For millions of square kilometers around the eruption site, the acid rain burns off most of the plants. First to go are the trees and larger plants. Even as far away as South Africa, the effects can be seen. Plants lie dead where once they grew. They rot and decompose. Dicynodon creeps about, looking for some palatable morsels, but finds very little – just some mushrooms, mosses, ferns and club-mosses nestling in damp crevices around the river banks.

Then comes a distant rumbling, unheard in South Africa, but the coup de grace nonetheless. Since the eruptions began, some 10,000 years earlier, the atmosphere and sea surface have warmed by two or three degrees and the frozen northern polar region begins to melt around the fringes. The Polar Regions in the Permian were much smaller than they are today, with limited ice caps. But frozen tundra extends hundreds of kilometers away from the poles, and the ocean margins are frozen too. A great icy mass of gas hydrate, locked in the sediments at the margin of the polar sea, is warmed by a degree or two, and it suddenly gives way. First a few bubbles, then many, and finally a huge expansion of gas – 160 times the original volume. What was once frozen and at high pressure, becomes gas at normal temperatures and pressures, and a vast volume of methane and carbon dioxide bursts upwards through the oceans and shoots out into the atmosphere, raising spouts of sea water hundreds of meters into the sky.

The addition of millions of cubic kilometers of carbon dioxide into the atmosphere, even though it is happening near the North Pole, affects the whole Earth. In the course of a few days, Dicynodon, feebly searching for scraps among the stinking decay of plants in southern Africa, and already feeling a rise in temperature of two or three degrees, is now hit by a further devastating blow. Carbon dioxide is driving the normal levels of oxygen downwards – he is gasping for air. And, day-by-day, the asphyxiation becomes worse.

After a week, heavier rains come. The monsoon has begun. The rain is still acidic, although much of the acid has now been washed out of the system. And the rain carries away all the stinking vegetation down the slopes, into the rapidly filling wadis. Jostling tree trunks, branches and mats of leaves rush down to the sea, where they are dumped a few kilometers offshore, at the end of the estuarine tracts. But most of the soil is washed away too. Without the binding roots of the plants, the soil is vulnerable. After a few days, there is almost no earth left, just bare rock, with pockets of soil clinging on in hollows where mosses, ferns and club-mosses have survived. The countless billions of tonnes of organic carbon locked into the plants and the soil across the whole Karoo have been stripped into the sea. Almost nothing remains. With the soil went the worms, spiders, centipedes, flies, beetles and everything that could not hang on to the rocks and the rushing torrents of water.

Carbon dioxide levels in the atmosphere are still higher than normal. And there are no negative feedback processes. Normally, the carbon dioxide would be removed from the atmosphere by photosynthesis, and the monsoonal rains would have been followed by a dramatic greening of the land. Dried-up trees would spring into life, producing leaves from their gnarled branches. The bare earth would miraculously sprout low ferns and seedferns, as dormant seeds broke into life. But the soil has gone, the land is just naked rock. Nothing like this had happened since the Precambrian, some 300 million years before, when life on land had not yet evolved.

Dicynodon follows the water downhill to the sea, half-starved now, having gone without food for more than a week. Mushrooms, which seem to be all that can flourish, are the only thing available, and they are far from his preferred diet. His instincts suggest there will be food where the water is. But he is wrong. Everything is topsy-turvy in this apocalyptic world. Just as the plants on land were killed by the acid rain, so too the seaweeds that fringed the shores. The increased carbon dioxide levels in the atmosphere have penetrated the top dozens of meters of the sea, and the plankton has been decimated. Within a week, all the shoals of fishes that used to rely on the plankton as their staple diet have starved too; then on up through the food chain: the sharks and larger fishes that fed on the planktivorous smaller fishes die too. The whole sea is poisoned. Rising temperatures have imposed anoxia.

Dicynodon, and all the other animals – the closely related smaller and larger dicynodonts, the bulky, knobbly plant-eating pareiasaurs, the small scuttling procolophonids, therocephalians, millerettids, and the large, sabre-toothed gorgonopsians – are close to death. They wander about on a blank, rocky landscape. They have difficulty in breathing, and their backs are burnt at midday by the hotter-than-normal sun.

Then comes the third eruption. It is not by itself a particularly huge eruption. But it leads to a further cycle of acid rain. Temperatures rise again by a further fraction of a degree. Another vast bubble of methane and carbon dioxide is released in the far north from a frozen gas hydrate deposit. Dicynodon is now living through a runaway greenhouse effect. Nothing can turn back the devastating rise both in carbon dioxide and in temperature. He curls up and dies, along with nearly every other living thing on land.

In the sea, the vast influx of organic matter from the land – all the dead plants, animal carcasses and soil – have carpeted the seabed in a stinking, black slime. The decaying organic matter consumes oxygen and gives off hydrogen sulphide. Seafloor life – all the reefs and their denizens, as well as the creeping worms and arthropods, and the burrowing mollusks and shrimps – die. Their carcasses are incorporated into the fetid, black, anoxic bottom slime. Stripped of oxygen from the atmosphere above, and with the black mud below, the oceans go into a spiral of anoxia: oxygen levels fall, step-by-step, until almost nothing survives. Only a few worms, brachiopods and mollusks that can exist at depth in oxygen-poor conditions manage to live through these harsh conditions.

The eruptions continue, at random intervals, to pulse basalt lavas over Siberia. Hundreds of meters of fresh rock accumulate. Sometimes eruptions are separated by days or weeks; at other times, there may be a standstill for a few thousand years, and the rare surviving plants and animals manage to re-establish themselves for a short time, before a further cycle of devastation begins. Some of the eruptions are small and have limited global effects, of course, but others are large enough to lead to the global effects just described. Some day, with ever-more precise study, it may be possible to tease apart some of the detail of the separate phases of the eruption of the Siberian Traps, and whether the killing happened all at the start of the eruption cycle, or whether the process was drawn out over half a million years.

Is this what really happened?

All the pieces of the cataclysm 151 million years ago have been put in place. Research in the past ten years has led to an astonishing, earthbound scenario for almost complete devastation of the Earth and of its inhabitants. The killing model makes sense in terms of what is now understood about eruptions and their effects on the atmosphere, about oxygen and carbon cycling in the earth-life system, about the composition of the oceans, and about gas hydrates. But much of this is very new work, and it might have to be modified in the future.

For many, there is a lingering desire for something more apocalyptic, more instantaneous, some deus ex machina such as a huge extraterrestrial impact. Surely, they argue, if the KT event, when 50% of species disappeared, required a vast meteorite, we need something even more catastrophic to kill off 90% or more of species? But the evidence for impact at the Permo-Triassic boundary is limited at the moment. That might all change of course any day, if the helium/fullerene story is confirmed, if a crater of suitable age is discovered, or if large amounts of shocked quartz and iridium turn up in rock successions in different parts of the world.

However, I’ll bet on the Siberian Traps coupled with gas hydrates for the moment.

What was so special about the Siberian Traps, and the whole end- Permian scene, that could have allowed the crisis to develop? The Siberian Traps were not the biggest flood basalts of all time. Much larger flood basalt volumes were erupted over the Central Atlantic, Java, the Caribbean-Colombian area and the Brito-Arctic province, 200, 120, 90 and 60 million years ago respectively. But these four were associated with generic extinction rates of only 20-30%, notably at the higher end of the range, but hardly devastating, and certainly not on a scale with the end-Permian loss of genera.

Maybe it was simply a coincidence of factors. The end-Permian was the only time when the continents were fully assembled into a single supercontinent and when there was a large flood basalt eruption episode. During the later large-scale basalt eruptions, the continents had drifted apart and maybe life had diversified sufficiently in the different continents and oceans to be able to resist a range of severe climatic changes. One almost certainly has to add the coincidence of a massive methane burp, although there is no independent evidence yet for this (apart from the difficulty of otherwise explaining the remarkably large and rapid negative carbon isotope shift). Thorough testing of all the hypotheses by Robert Berner of Yale University has shown that massive methane release has to be the main cause of the dramatic carbon shift, with lesser contributions from volcanic degassing and mass mortality. This isn’t proof, but he ran all the possible causes against his well-established climatic models.

Much more has yet to be found out about the end-Permian crisis. Geologists and palaeontologists are far from understanding step-by-step just what happened. But, as we have seen, ideas have sharpened and focused remarkably since 1995, and will doubtless continue to do so. One thing is clear, however. The biggest mass extinction of all time did happen 251 million years ago, and even if we cannot yet fully explain why, it is important to look at the consequences of cutting life down to 10% or less of its normal diversity. There are lessons to be learnt.

284 THE SIXTH MASS EXTINCTION?

In 1992, Al Gore, then the Vice-President of the United States of America, wrote,

… it occurred to me that … we are causing 100 extinctions each day – and many scientists believe we are …’

This is a startling figure, and the prediction resulting from the calculation quoted by Gore is that all of life will be extinct in 400 to 800 years. Do we believe this? What is the scientific basis for such dramatic predictions? Or should we settle back comfortably with the extreme Bible-belt Americans who think that everything on Earth was created by God for the benefit of humanity, and therefore that anything done by human beings is by definition good?

Probably both positions are gross caricatures, and it would be sensible to be cautious. Al Gore based his statement on the reputable calculations of Paul and Anne Ehrlich in 1990 that perhaps 70-150 species are becoming extinct each day. Scaling this up to current estimates of total global diversity leads to the alarming prediction of how long life will last on the Earth. Perhaps the daily extinction estimate is too high, but such calculations always lead to startling conclusions about the total time to extinction of all life.

If human activities are truly causing such devastation, then we are certainly witnessing the sixth mass extinction (the other five being the geologically documented ‘big five’). In this case, a close understanding of the events of the past will shed light on what is happening now, and what may happen in the future. In particular, people often ask how long does it take for life to recover after the devastation of a mass extinction

295 THE SIXTH MASS EXTINCTION?

The ‘reef gap’ following the end-Permian extinction was one of the most profound pieces of evidence of major environmental crisis. The rich tropical reefs of the Late Permian had all gone, and nothing faintly resembling a reef was seen for 10 million years after the event. This can hardly be a result of poor study or collecting. Not a single coral specimen, a bryozoan or any other reef animal has been found. What were once huge structures, often tens or hundreds of kilometers across, and dominating many coastal strips, had gone entirely. When the first tentative reefs reassembled themselves in the Mid Triassic, they were composed of a motley selection of Permian survivors, a few species of bryozoans, stony algae and sponges.

There are various kinds of reefs. We think of structural reefs as typical – great walls of coral skeletons, often built up over millennia, and some-times tens of kilometers long. But the Mid Triassic reefs were modest affairs termed ‘patch reefs’, that is, low amalgamations of reef-like creatures forming a little cluster on the sea bed. The scleractinian corals were there, close relatives of the corals that abound in tropical seas today; they were diverse, but rare. It took another 10 million years before these corals had become relatively common, in the Late Triassic, and before reefs grew in size and complexity again. But they were still much smaller than in their heyday in the Late Permian.

Reefs show it, ammonoids show it and bivalves show it. The reptiles and plants too. One of the surprising recent discoveries about the Early Triassic recovery of life in the sea is that there was this apparent gap of 10 million years before recovery really began, in the Mid Triassic. Evolution was in effect suspended. Simplistically, one might have expected the recovery to begin at once. After all, the lands and seas had been stripped of life. Normally, plants and animals live in tight patterns of ecological harmony, kept in balance by day-to-day interactions such as competition and predation. If one species is pulled out of the system, the others will soon move in and take over. So why did life not begin to expand and diversify at once?

There are three suggestions. The first is that the delay is apparent, not real. For whatever reason, palaeontologists have simply failed to collect fossils in rocks of Early Triassic age, and there was no delay. Life was burgeoning and bursting to evolve, but the fossils either were not preserved, or they have been missed. This is always a hard argument to refute, since all the palaeontologist can say, perhaps rather plaintively or tetchily, is that he or she has looked damned hard, and there really is nothing there. Tens of thousands of person hours have been spent by competent palaeontologists, who seem to manage to find fossils in abundance elsewhere, poring through Early Triassic rocks. What do they find? Lystrosaurus and Claraia, and nothing else. The longer and harder they look, and as they continue to find nothing, one has perhaps finally to believe that the gap is real.

So if the gap is real, what was the problem? The two suggestions are that either conditions were so harsh that nothing could live, or that the end-Permian crisis had been so profound that it knocked out all normal ecological and evolutionary processes. Or maybe both factors were in operation.

Post-apocalyptic misery.

There is little doubt that the earliest Triassic world was grim. Oceans worldwide were at a standstill, with anoxic waters widespread and deposition of black shales common. Pyrite was forming in these shales, and other chemical anomalies indicate that normal processes had ceased. The low-oxygen conditions of the deep sea floor suggest that normal oceanic circulation had stopped, or slowed down. Normally, there is mixing of deep, cold sea-bottom waters with the warmer surface waters. The process moves at a stately pace, and full mixing may take decades, but it happens.

If normal mixing stops, the nutrient cycling processes would be destroyed. Upwelling, cold, ocean-bottom waters cycle organic nutrients along certain coastal margins. The most famous example of this is along the west coast of South America, where the nutrient feast from the deep encourages huge shoals of fish (and huge herds of fishermen, human and avian). If organic matter were lying undisturbed on the sea bed – and it was, as witnessed by the black carbon-rich shales that were being laid down in the deep oceans and basins – there could have been no nutrient cycling by upwelling.

The oceanic anoxia expanded into shallow waters too. So shallow seas, normally teeming with life, also suffered low-oxygen conditions. This would have devastated all the groups that normally rely on abundant oxygen and nutrients, and while these horrific conditions continued they could not re-establish themselves. It has been estimated that anoxic conditions persisted in shallow sea waters for several hundred thousand, or perhaps a million years. The silent, anoxic ocean floor persisted for much longer, probably the full 10 million years of the cessation of evolution.

Conditions were no better on land. The low-oxygen conditions in the oceans affected the atmosphere as well, and evidence comes from the ancient soils laid down during this interval. The famous ‘coal gap’ of the Early and early Mid Triassic was a time of sparse vegetation. The extinction crisis had stripped the land of plant life, and erosion became rapid. The Early Triassic soils were sparse and showed a low diversity of plants that were specialized in surviving in hot, acidic conditions. After 10 million years, finally, in the Mid Triassic, the first thin coal seams are found. Coal indicates relatively lush, usually tropical-type vegetation. It was only in the Late Triassic, some 20 or 25- million years after the mass extinction, that thicker coal seams are found, something like those that were formed in the Late Permian.

The second proposal, that life was held in check by a breakdown in the normal rules of ecology and evolution, seems less likely Of course, for the initial thousands of years after the crisis, such effects could be imagined, but 10 million years is a long time for any group of organisms to remain in stasis. After the crisis, many of the surviving species would have been present in only small population sizes. Under normal conditions, each species has an effective population structure, in which individuals breed widely, and with movement between populations. This keeps up a good genetic ferment, and maintains a breadth of genetic possibilities for evolution, should that be required.

Low population sizes can lead to problems. The scope of genetic variation is severely limited. Indeed, whole swathes of the genome have been lost, and the survival of up to 10% of species into the earliest Triassic implies an even more severe curtailment of the overall number and variation of genes. So the rules of evolution were almost certainly different for a while, until population sizes of species built up again. It is hard to believe, however, that unnaturally low population sizes could have been maintained for 10 million years. The delay in recovery must have had more to do with the abysmal Early Triassic world.

As if that were not enough, there was a follow-up extinction event, towards the end of the Olenekian stage, some 2 or so million years after the end-Permian crisis. Ammonoids were again hit hard, almost disappearing

299 THE SIXTH MASS EXTINCTION?

about the size of a terrier dog, so it would have been within the dietary range of some of the predatory birds.

This sort of short-lived experiment is typical of recoveries. The first species to become established may have a good evolutionary run for their money. New species can proliferate at a faster than normal rate as vacated niches fill up, and as ecosystems reconstruct themselves. But some of the first-comers may not be able to cling on to their positions, if, for instance, they are not as well adapted to their roles as other species that come in and take over. In the end, the giant terror birds gave way in most places to mammalian predators, the ancestors of cats and dogs. So, during a post-extinction rebound there can be a phase of rapid niche-filling, and then comes the inevitable sorting and stabilization phase when many extinctions happen, and ecosystems readjust to a pattern that may then hold sway for many million years or more of relative stability.

Panic or complacency?

Lessons from the past can be read in two ways. The ecological activist would emphasize how human activities are destroying biodiversity and how this could turn into a cascade of death as species after species becomes extinct. As tropical forests are cleared and reefs are poisoned, we are losing not only species, but whole habitats. The palaeontological record of mass extinctions then makes grim comparisons. We know that after a mass extinction, life takes a long time to recover. The geologist may say that 10 million years is a short time, but measured in human lifetimes, it is effectively infinity.

Low levels of extinction can turn into high levels. Destroying species and habitats piecemeal might lead to a runaway crisis, as seems to have happened in the past. Once the world becomes locked into a spiral of downward decline, it is impossible to see how any intervention by humans could turn it back. It could be, for example, that removing one or two species from an ecosystem does little damage. The remaining species can adapt and plug the gaps. But if another few species are picked off, then another few, and then a few more, a point may be reached when that ecosystem will collapse. Better to stop destroying the environment before we become locked into such a catastrophic sequence of events. The natural world is complex, and consequences are often unpredictable.

Destruction of forests can kill ocean fish, for example. Plants take up carbon dioxide during photosynthesis and pump out oxygen. Animals require oxygen, but produce carbon dioxide as a waste product. There is a balance here, and that balance could be perturbed by destroying too much of the world’s forests. Cycling of carbon is important too, as dead plants and animals are incorporated into the soil, as organic carbon builds up in the bottoms of lakes or is washed into the sea. Nutrients from these sources then circulate in the oceans, providing sustenance for fishes.

A political conservative could also claim justification from the fossil record. Such a person would note that life has always bounced back, even from a mass extinction as profound as the end-Permian event. Evidently, each species locks up a huge evolutionary potential in its genes and given the chance to explore the extent of its full capabilities, most species seem to be able to proliferate and expand into new niches. Indeed, the conservative, warming to the theme, might suggest that species that have been killed by human intervention were obviously rather feeble, and a bit of extinction is good for the moral fiber. Who needs dodos and great auks anyway?

This conservative viewpoint has gained ground in some political circles. Bjorn Lomborg,9 a Danish statistician and one-time green campaigner, argues that world resources are not running out, that forest cover across the world has increased and that the world’s species are not disappearing at an alarming rate. His views have inevitably been greeted with outrage by many, who claim that he has selected narrow definitions of natural phenomena in order to make his case: farmed, temperate-climate tree nurseries differ from ancient, complex tropical forests. It is startling none the less that it is still difficult to make definitive and universally convincing statements about the state of the natural world today.

Coming back to reality

Much as one might wish to accept such reassuring claims, they are too complacent. Of course some life will survive human depredations. It may be cockroaches or rats, but to claim that humans cannot drive all life to extinction is hardly cause for congratulation.

There are lessons to be learnt from the past. Human activities have done more than eliminate just one or two species here and there. The first Maoris in New Zealand killed all the moas, some 13 or more species of impressive, large, flightless birds, thus eliminating an entire family of birds, the Dinornithidae, sometime before 1770. The Maoris also killed off other, smaller families of native birds. Similarly, after Europeans arrived on the Hawaiian islands in 1788, 18 bird species disappeared, and another 12 species may be extinct. Of 980 species of native Hawaiian plants, 84 have already been eliminated, and a further 133 have wild populations numbering fewer than 100 individuals.

The famous ‘red books’ of the International Union for the Conservation of Nature classify different levels of threat to present species. Thousands of species are listed as in danger of extinction, and the lists become longer and longer each time they are revised. Species under threat include much-loved forms such as pandas, tigers and blue whales. Millions of dollars are spent by governments and charities in order to try to con-serve such species. Special breeding programs in zoos help the effort, and sometimes – rarely – these huge efforts allow a species to come off the endangered list. But at what cost? We can eliminate a species in a moment, but conservation is expensive. And of course, while people will pay for the rescue of the panda, the California condor, even the Kerry slug, who will pay for the protection of the countless uninteresting beetles, bugs, scorpions, frogs, snakes and tropical plants that are just as close to extinction? And what of the threatened species we don’t even know about?

The extinction estimates quoted by Al Gore have a firm basis in fact. The only substantial reason to question them is that there may be levels of extinction resistance among species. What we have mentioned so far is the extinction, to a large extent, of extinction-prone forms, endemics restricted to single islands for example. If there is such a sliding scale, and we are busily eliminating the more precarious species, perhaps rates of extinction will decline as humans tackle the more recalcitrant species, the ones that just refuse to give in and die.

On the other hand, human populations are increasing exponentially. The time it takes for the human population to double keeps diminishing. Global populations rose from 100 million to 200 million between the time of Christ and ijoo. The 400 million mark was achieved by 1700,800 million by 1800,1600 million by 1900, 3200 million by 1980, and with current levels at nearly 6000 million (6 billion), the doubling time is down to 25- years. At today’s levels of human population, some 40% of global productivity has been sequestered for our benefit – including all humans and their domesticated plants and animals. This means that all other species have somehow to get by on only 60% of the oxygen and carbon (well it’s more than 60% since human and domestic waste goes into the ‘wild’ systems) that they had available to them in the days of Julius Caesar.

And even though the exponential rise in global human population is damped, or slowed down, by famines and wars, the rate continues to go up. This brings a pressure that might cancel out any tendency to reduction of current extinction rates. So, argue many, the debate about extinction-prone and extinction-resistant species is irrelevant. They’re all going to go anyway, as wealthy nations pump pollutants into the atmosphere, and poorer peoples replace natural habitats with poor-quality farm land. There is no room for complacency.

Unanswered questions

Ironically, extinctions in the distant past are better understood than the current crisis. Reversing that well-worn maxim, it may be that ‘the past is the key to the present’. Normally, geologists and paleontologists bow humbly before scientists who work on modern phenomena. To understand how rivers worked in the Permo-Triassic of the Karoo Basin, the geologist seeks advice from geographers and geomorphologists who study modern river systems. To understand what Archaeopteryx looked like, the paleontologist consults an ornithologist. In extinction studies, paleontology has (some of) the answers.

As we saw earlier, biologists have failed to estimate current biodiversity, with estimates ranging from j to 100 million species. Biologists have also failed to estimate current extinction rates, and there are robust debates around the figures quoted at the beginning of the chapter by Al Gore. Paleontologists, on the other hand, can give good estimates of extinction rates, certainly at family and generic levels, and they have relatively reliable ways of turning those into estimates of species extinction rates. So we know how profound the end-Permian crisis was and the scale of the KT event. We know also how long the recovery took, since time-scales were long.

Paleontologists, of course, become more hesitant when pressed about how long any particular extinction crisis lasted. Their weakness is short

304 THE SIXTH MASS EXTINCTION?

I have tried to show in this book, by weaving history and science, how arguments are often re-run generation after generation. Scientists are evidently human too. They can be prejudiced, they can be scared or constrained. Catastrophic extinctions in the geological past is a beautiful example of an idea that was presented in the 1820s, that was firmly crushed by Lyell, and could only raise its dangerous head again in the 1980s. It took years for geologists to dare to accept the obvious, that there truly have been mass extinctions in the past and that structures on the Earth’s surface that look like impact craters actually are impact craters.

To have lived through the tail-end of this switch-over has been fascinating. I was taught by anti-catastrophists, but I now preach asteroids and mass extinctions to my students. Even more rapid has been the accumulation of knowledge about the end-Permian event. Everything changed between 1992 and 2001. In that time, the event focused down from 10 million years to a few thousand years. The Siberian Traps flowed into view as the main culprit. Gas hydrates, undreamt of before the1970s, suddenly became the answer to abrupt climate changes in the past, and perhaps crucial as part of a runaway greenhouse model for the end-Permian environmental crash. Long drawn-out post-apocalyptic anoxia is every-where in the Early Triassic.

Such rapid accumulation of knowledge and ideas has its risks. This book may thereby have a short shelf-life as scientists disprove all the wild-eyed theories that were published in the last years of the twentieth century. Fin desiede excess, they will claim. Perhaps not, though.

As one grows older, one realizes how little one knows: ‘the more you learn, the more ignorant you become’. The joy of being a scientist is to discover this. When I was beginning my career, I felt that scientific research was a line of work that led to ever greater complexity. As one accumulated information about how the Earth works, all the simple questions would be answered. Then the questions would have to become more intricate and harder to solve.

But the unanswered questions are as big and as simple as you could wish for (although the answers may be so intricate as to be unattainable). How diverse is life? How does the world react to human intervention?

 

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How to improve railroad fuel efficiency

[ Below are excerpts from this 70 page report. It is hard to find documents on reducing oil consumption through energy efficiency, most papers concentrate on greenhouse gas emissions, which usually lowers energy efficiency, or how to grow roads, rail tracks, and ports to handle the infinite growth in the future.  Alice Friedemann  www.energyskeptic.com

Update: RR have continued to improve their efficiency since this paper was written, from 403 ton-miles to 476 miles in 2015 (see “When trucks stop running” for details.)]

Stodolsky. 2002. Railroad and Locomotive Technology Roadmap. Center for Transportation Research Argonne National Laboratory,  United States Department of Energy.

The approximately 4 billion gallons of diesel fuel that are used by locomotives each year is about 10% of the total diesel fuel used in transportation and 2.3% of all the fuel used in transportation in the United States (Davis 1997). Large freight carriers consume most of this fuel. U.S. railroads spend over $2 billion per year, or approximately 7% of their total operating expenses, on diesel fuel (AAR 2002). Because fuel costs represent a significant portion of the total operating costs of a railroad, fuel efficiency has always been an important factor in the design of locomotives and in the operations of a railroad. In terms of energy efficiency, these are dollars well spent. An important measure of rail energy efficiency is revenue ton-miles per gallon of fuel consumed. A revenue ton-mile is one ton of a customer’s goods moved one mile. Simply stated, it measures the amount of real work that freight railroads do for their customers for every gallon of fuel used. (Passenger railroads use passenger-miles per gallon for a similar measure.)

America’s railroads have dramatically increased the number of ton-miles delivered per gallon — from 235 in 1980, to 332 in 1990, and then to 403 in 2001, which is an increase of over 71% (AAR 2002). This achievement was due to the combined effect of many technological advances and improvements in dispatching and operations, as well as to shifts in the mix of commodities transported and to longer shipment distances by dense commodities, like coal.

The U.S. Environmental Protection Agency has established strict emission standards to be implemented in stages (Tiers 0, 1, and 2) between 2000 and 2005. Locomotives currently emit over one million tons of NOx each year, which is about 5% of total NOx emitted by all sources (Orehowsky 2001).

Some of the technologies that could be employed to meet the emission standards may negatively affect fuel economy — by as much as 10–15% when emissions are reduced to Tier 2 levels.

Lowering fuel economy by that magnitude would have a serious impact on the cost to the consumer of goods shipped by rail, on the competitiveness of the railroad industry, and on this country’s dependence on foreign oil.

The ability of locomotive manufacturers to conduct research into fuel efficiency and emissions reduction is limited by the small number of locomotives manufactured annually. Each year for the last five years, the two North American locomotive manufacturers — General Electric Transportation Systems and the Electro-Motive Division of General Motors — have together sold about 800 locomotives in the United States. With such a small number of units over which research costs can be spread, outside help is needed to investigate all possible ways to reduce fuel usage and emissions.

An estimated 43% of the gain came from the increased share of ton-miles represented by coal and other dense commodities (Vyas 2001).

The railroads, their suppliers, and the federal government have embarked on a cooperative effort to further improve railroad fuel efficiency — by 25% between now and 2010 and by 50% by 2020, on an equivalent gallon per revenue ton-mile basis. They also expect to meet emission standards and achieve these goals in a cost-effective, safe manner. Achieving these goals will save 700 million gallons of fuel per year by 2010 and 1.3 billion gallons of fuel per year by 2020, at current traffic levels.

This effort aims to bring the collaborative approaches of other joint industry-government efforts, such as FreedomCAR and the 21st Century Truck partnership, to the problem of increasing rail fuel efficiency.

DOE plans to bring similar efforts to bear on improving locomotives.

Although it may be possible for the railroad industry to benefit from developments in the trucking industry (which is faced with a faster schedule for emissions reductions on a g/bhp-h basis), railroads have unique characteristics that pose different challenges than those facing the trucking industry: 1. Locomotive engines have larger bores and lower speeds, which means that fuelsystem modifications developed for trucks cannot be directly transferred to locomotives; 2. Engine cooling is more difficult; consequently, engine air temperatures (which affect NOx formation) are much higher than ambient; and 3. Long expected life (40 years) requires substantial built-in durability and the need to retrofit the many locomotives in service.

On the basis of the research objective of improving total railroad average fuel efficiency by 50% by 2020, the government’s portion of funding for locomotive and railroad R&D to achieve this is estimated to be about $20 million annually for about 14 years, to bring funding on a level consistent with that of heavy trucks.3 Assuming that the goals are met and railroad average fuel efficiency increases by 50% in 2020 (savings begin in 2005) and remains constant thereafter, a total of 600 million barrels of oil will be saved between 2005 and 2030. On the basis of this assumption, about $0.46 of government funding is expended per barrel of oil saved. With an estimated average industry cost-share of 25%, total R&D funding is about $0.58 per barrel saved.4 These estimates exclude effects from a shift of freight from trucks to rail, which would further increase energy efficiency and improve cost-effectiveness. Additional global benefits will accrue from the sales of (1) advanced locomotives and train systems overseas and (2) engines for marine applications.

TABLE S.1. Potential Research Topics

Train Systems

  • Operations Optimization
  • Consist Management
  • Aerodynamics
  • Wheel/Rail Friction
  • Rolling Resistance

Locomotive Systems

  • Idle Reduction
  • Energy Recovery
  • Motors and Drives

Locomotive Engines

  • High-Efficiency Turbo
  • Sensors and Controls
  • Fuel Injection/Combustion
  • NOx Adsorber
  • PM Trap

Advanced Powerplants and Fuels

  • HCCI
  • Alternative Fuels
  • Fuel Cells

The DOE R&D budget in fiscal year 2002 to improve heavy truck fuel efficiency is $88 million. Assuming this funding continues until 2010, and considering past funding starting in 1996 on heavy trucks, a total of $1.1 billion will have been spent by the government. According to DOE, cumulative energy savings from heavy truck advanced technology will be 2,384 million barrels by 2030. (Source: http://www.ott.doe.gov/facts/pdfs/ facts_quality_metrics_). Applying this cost-benefit to railroads, total R&D funding needed would be $280 million over about 14 years, or an average of about $20 million each year.

Costs exclude capital equipment, infrastructure costs, and production costs needed to implement the technology.

BACKGROUND

U.S. railroads spend over $2 billion per year, or approximately 7% of their total operating expenses, on diesel fuel. New emission standards — to be implemented in stages between 2000 and 2005 — may reduce the fuel efficiency of new locomotives by as much as 10–15%. With the potential to substantially increase operating costs and further erode already tight net operating income, meeting those standards could become a major obstacle to the economic health of the industry.

Today, over 3.5 trillion ton-miles of freight are transported each year by five modes: rail, truck, water, pipeline, and air.

Unfortunately, most of the techniques for reducing NO x also decrease the fuel efficiency of the engine and raise PM emissions. This decrease in fuel efficiency would have a serious negative effect on the financial stability of the railroads and, thus, provides an additional urgency to finding ways to improve fuel efficiency. As is shown in Figure 6, the decreases in fuel efficiency to achieve the Tier 1 limits are expected to be between 5 and 15%

UNIQUE ASPECTS OF RAILROADS

Although it may be possible for the railroad industry to benefit from developments in the trucking industry, which is faced with a faster schedule for emissions reductions, railroads have unique characteristics that pose different challenges than those of the trucking industry.

  • Trains have much less freedom in choice of speed because their schedules must be coordinated with those of many other trains on the same track. In addition, locomotives must be able to pass through long tunnels, limiting the size of mechanisms that can be attached to the exterior and producing special challenges with respect to thermal management.
  • On-road trucks have large exposed radiators in the front, and with speeds usually maintained above 50 mph, ample air (ram air) is available for both engine and aftercooler cooling. In contrast, locomotives usually run in consists (i.e., groups) of two or more, often run in “reverse” or in the middle of the train, and spend most of their time at speeds below 45 mph. The radiators are mounted in the roof and cooling fans are required to remove engine heat. Air-to-air after-cooling is difficult; consequently, engine air temperatures (which affect NOx formation) are much higher than ambient.
  • Trains have less flexibility in operations because they cannot change their routes to go around a problem, and they may need to sit on a siding while another train passes.
  • Locomotive engines, which have up to 6,000 horsepower, are, of course, much larger than truck engines. Their larger bores and lower speeds mean that fuel-system modifications developed for trucks cannot be directly transferred to locomotives, although many of the approaches (e.g., higher pressures, multiple injections, shaped injections) could be used in modified form. Also, locomotives have considerably less power per ton carried than do trucks.
  • Truck engines are coupled directly to a mechanical transmission and are required to operate over the entire engine speed and load map, whereas locomotives employ a diesel-electric system and only eight specific power settings (notches). Notches correspond to eight set engine speeds.
  • Locomotive engines are expected to last for at least 40 years, which places greater emphasis on durability. This low turnover rate also limits the penetration rate of new technologies; however, locomotives undergo many overhauls, providing opportunities for modifications throughout their lives.
  • Diesel fuel for locomotives can contain 10 times more sulfur than diesel fuel for trucks contains. Sulfur contributes to formation of engine-out particulate matter, corrosive exhaust gases, and rapid poisoning of some aftertreatment devices.
  • Whereas trucks are severely limited by weight and size, it is relatively easy to add another car, such as a fuel tender, to a train when more space is required for additional equipment. However, adding a car that does not carry freight can impact the productivity of the train.8

The diesel engine is the most efficient transportation power plant available today.

Thermal efficiency of locomotive diesel engines is 40% or higher, which results from high power density (via high turbocharger boost), high turbocharger efficiencies, direct fuel injection with electronic timing control, high compression ratio, and low thermal and mechanical losses. Many locomotive engines achieve the equivalent of one million miles before overhaul (36,000 megawatt-hours).

A focused research and development program could enable the locomotive diesel engine to achieve thermal efficiencies of 50-55%, resulting in a reduction in specific fuel consumption of about 20%.

Meeting the technical targets for high efficiency and simultaneously reduced emissions will require advances in four areas: in-cylinder combustion and emission control, after-treatment, thermal (exhaust gas) management, and sensors and controls.

Trains rely on high friction under locomotives to keep wheels from slipping and sliding when power is applied. Past studies have indicated that energy savings could be as high as 24% when friction at the wheel/rail interface is properly managed. Friction is also required under braking conditions to control train speed down hills or to bring a train to a safe stop. Much lower friction levels are desirable under normal train operations and can significantly reduce the energy required to pull a train. Therefore, the key is to apply the lubricant just where it is needed and to make sure that it does not cover the track where high friction is needed for traction or braking.

6.4 WHEEL/RAIL FRICTION

A significant fraction of the energy consumed in rail transport is due to wheel/rail friction. The magnitude of the wheel/rail frictional energy losses relative to other losses (bearings, aerodynamic, and grade) depends on the condition of the track (dry or lubricated), whether the track is curved or tangent, truck design, wheel rail profile conformance, truck wear resulting in poor steering, and train speed. Typically, for curved track, a 33% reduction in the rolling resistance can produce a 13% reduction in total resistance, while for tangent track, a similar reduction produces a 3% reduction in total train resistance.

Technical Barriers. Reliability of devices for applying lubricants to the rail or wheel flange is the major barrier to wider use. The devices must operate in very harsh environments. Locomotive-mounted lubricators may cause excess lubricant to migrate to carriage underbodies and truck sides, which increases the potential for fires and produces a difficult environment for maintenance operations. Lubricant from either wayside lubricators or locomotive-mounted lubricators may migrate to the top of the rail, where it causes poor traction. Concerns about TOR lubrication include buildup of lubricant on the rail, reliability of applicator devices, and compatibility of TOR with flange lubrication.

6.5 AERODYNAMICS

There appears to be little room to improve the aerodynamic design of locomotives. However, considerable aerodynamic-drag losses are found for certain car configurations, especially those that include empty coal cars and intermodal cars. One company has found that aerodynamic drag accounts for about 15% of the round-trip fuel consumption for a coal train, and that fuel consumption is approximately the same for an empty train as it is for a full one. In an experiment with simple fairings or foils (not a full cover) to direct the air flow over the empty cars, about a 25% reduction in aerodynamic drag was achieved, which resulted in a 5% fuel savings for the round trip. For intermodal cars (two containers stacked on a flat car), about 30% of the energy loss is due to aerodynamic drag.

Potential for Fuel Savings. Coal transport consumes approximately 1.5 billion gallons of fuel annually; a 5% savings due to reduction of aerodynamic drag would be 75 million gallons, or 2% of total Class I railroad fuel consumption. The primary challenge is to develop a system for covering empty coal cars that does not interfere with loading and unloading and that does not require much time to install. Other challenges are limited maintenance requirements and high reliability and durability.

7.2 FUEL CELLS

The fuel cell is generally considered to have the greatest potential for replacing the internal combustion engine on vehicles. When one considers that present day locomotives are electrically driven (via direct overhead wire, third rail, or diesel-generator set electrification), the fuel cell can potentially replace both diesel-electric and electric locomotives if the technology can progress to be physically feasible and economically viable. With the potential for high efficiency and very low emissions, this technology has been monitored for many decades with great interest; however, the technical and economic challenges have inhibited serious commercialization plans.

Locomotives require significant horsepower for transport.

Fuel-cell technologists have made significant progress in demonstrating devices with higher power density. While recent advances in power density may enable consideration for locomotive applications, much work remains to demonstrate adequate operational life and to develop highly efficient methods to reform (or process) hydrocarbon fuels to generate sufficient quantities of hydrogen for the locomotive application.

Fuel cell research needs to be conducted with a focus on components that, when integrated together as a total system, will demonstrate an operational utility equal to or better than the electric and diesel-electric locomotives presently in operation or contemplated for the future.

Information in the public domain generally indicates that current programs for automobile and stationary power applications will not meet locomotive application requirements; therefore, dedicated research for the locomotive propulsion system is required.

Some of the unique application requirements for the locomotive include (but are not limited to):

  • physical size
  • vibration and shock
  • operational temperature range
  • voltage magnitude and electrical-current output capability
  • sufficient fuel storage to enable an operational range equivalent to present locomotive operations with No. 2 diesel fuel
  • reformer technologies for fuels having higher energy demands

Potential for Fuel Savings . The thermal efficiencies of fuel/cell reformer combinations and diesel engines are roughly equivalent, so a direct replacement of one for the other would have little effect on fuel efficiency, until an inexpensive, low-impact H2 source is developed. The main driving force for fuel cells, of course, is emissions reductions.

Technical Barriers. Important technical barriers remain for application of fuel cells to locomotives.  Efficient reformation of hydrocarbon fuels is a major barrier, which greatly counteracts and negates the efficiency gains from the fuel-cell stack.

Most fuel-cell R&D does not address the more stringent locomotive operational environment. The locomotive application does not generate interest among researchers because the annual production volume for locomotives is extremely small compared with much higher-volume applications (e.g., automotive). Whereas automotive volume may enable lower fuel-cell cost, those devices will not be applicable to a locomotive without dedicated research to meet locomotive requirements.

Sulfur levels in many fuels are too high for most present or proposed fuel-cell systems.

Requirements for the fuel-cell auxiliary and support systems remain a packaging challenge.

Suggested R&D. The following research activities would be necessary to develop fuel cell technology to a point at which it would be suitable for locomotives. • Intensify research for storing larger quantities of hydrogen safely and reliably. • Initiate a broad research program for reforming hydrocarbon fuels specifically for locomotive application. • Continue research toward higher kilowatt output per unit volume and weight for the most promising fuel-cell technologies (PEMFC, SOFC, PAFC). • Continue research for providing either (1) fuel-cell devices that are more tolerant of impurities in the air and hydrogen supply systems or (2) air supply and hydrocarbon fuel reformers capable of delivering purity levels required by the respective fuel-cell technologies.

7.3 GAS TURBINES

Potential for Fuel Savings. The gas turbine has no potential for fuel savings compared with a diesel engine, but it could be used to reduce emissions.

Technical Barriers. Gas turbines are continuous-combustion heat engines and therefore have the ability to burn a wide variety of gaseous and liquid fuels. Impurities, such as vanadium and sulfur, that affect the high-temperature parts, are problematic, but gas turbine combustors can be designed to burn most environmentally friendly fuels, such as natural gas, hydrogen, synthetic fuels, and alcohols. In the past, high cost and low-duty-cycle efficiency have been the biggest technical barriers to the application of gas turbines on U.S. railroads.

At low-duty factors, high fuel consumption at idle and low load make the turbine uneconomical. A typical railroad duty cycle puts a 5,000-horsepower gas turbine at a 25% fuel consumption disadvantage compared with today’s locomotive diesel engine.

The cyclic load profile of the typical locomotive is a challenge to gas turbines. Locomotives experience several full load swings per hour. The typical aircraft gas turbine sees one cycle per flight, and power plant turbines see nearly constant speed operation. Transience is also a problem for gas turbines in terms of fuel efficiency.

First cost is another significant barrier. The typical cost of a 5,000-horsepower gas turbine is roughly the same as the entire diesel locomotive, which is three to four times higher than a comparable diesel engine. If gas turbine locomotives are to be widely utilized, the higher first cost of the turbine must be offset by its environmental value and operating costs.

7.4 LOCOMOTIVE ELECTRIFICATION

There are two main methods for supplying power to electric locomotives: an overhead wire system (catenary) or a third electric rail. High-voltage AC currently provides most overhead power supply. Higher voltages, with less current, limit heat losses in the overhead transmission of electricity; however, there is a trade-off because of potential hazards and the need for costly on-board equipment to use the higher voltages. Power levels of about 25 kilovolts are used in new catenary systems and represent a compromise of efficiency and cost.

Locomotive electrification is well established in the industry. It is useful where rapid acceleration is important, such as some commuter rail systems, but it is not currently economical for long-haul freight service.

7.5 ALTERNATIVE FUELS

The use of alternative fuels in locomotives could help reach national goals related to fuel diversity, use of domestic energy resources, energy efficiency, and lowering of exhaust emissions. However, most alternative fuels, with the exception of biodiesel and oxygenated diesel (oxydiesel), cannot be used directly without substantial modifications to engine and locomotive systems, as well as to the refueling infrastructure.

Alternative fuels are most readily used in the trucking industry by fleets having central refueling and maintenance facilities

The truck and bus industries have conducted fleet studies to compare the performance of natural gas, ethanol, methanol, and biodiesel with that of diesel fuel. These fleet studies have shown that alternative-fueled vehicles generally have higher operating and maintenance costs than conventional diesel-powered vehicles. The operating costs can vary significantly because the fuel price is strongly dependent on the location of the fleet operation. Maintenance costs are generally higher for alternative-fueled vehicles since their technologies are less mature.

Natural gas in CNG or LNG form shows promise because of lower NO x and PM emissions and favorable environmental image. Use of CNG or LNG typically adds 15-25% to vehicle cost as compared with diesel-fueled vehicles because of the higher cost of the engine and fuel storage and delivery systems. In addition, on a BTU basis, LNG costs about 60% more than diesel fuel. Field tests of a CNG-powered locomotive by the Burlington Northern Railroad in the mid-1980s showed that CNG is impractical for wide-scale railroad use because of its relatively low energy density (Fritz 2000). However, LNG has a considerably higher energy density, and locomotive engines have been successfully converted to operate well on LNG.

While LNG can produce a 60% reduction in NO x and some decrease in PM compared with a conventional diesel engine, the amount of unburned HC and CO from a LNG engine can be much higher (Fritz 2000).

Technical Barriers. The primary barriers for alternative fuel use are not technical — they are cost, market acceptance, reliability, and deployment. Because of the additional cost of most alternative fuel technologies, an incentive (such as lower alternative-fuel cost or a perceived threat of a fuel shortage) will be required to create a market for their use. The primary barriers for the use of natural gas pertain more to fuel storage and refueling facilities. If extra fuel tanks are required, then space availability on the locomotive can be a barrier.

The primary barriers for Fischer-Tropsch diesel are economic. Feedstock would be most economically available in remote locations where large quantities of natural gas are available, but capital costs for production facility construction would be high in these locations because of a lack of general infrastructure. Fischer-Tropsch diesel also could be produced from solid fuels (such as coal) through a gasification step, but that would require additional capital investment in the fuels-processing plant. The abundance of coal resources in the United States could make this option more attractive if supplies of natural gas become tight. Direct firing of micronized coal/water slurries has been investigated, but that process requires very deep and potentially expensive processing of the coal to remove ash and other contaminants, as well as extensive modifications to the fuel-handling and injection equipment on the engine. Reliability of the engine and fuel equipment is another barrier.

The primary barrier for biodiesel, oxydiesel, and water/diesel emulsions is high production costs. Additionally, untreated biodiesel has issues related to oxidation, high viscosity, and thermal stability, and oxydiesel has issues related to lower lubricity, corrosion, and high vapor pressure. For example, the lower lubricity of oxydiesel, in excess of 5% ethanol, has shown to contribute to abrasive wear and cavitation in high-pressure fuel injectors in durability testing. Long-term stability of water/diesel emulsions is considered a barrier, as is the durability of fuel-injection-system components.

Gaseous fuels present additional barriers that require a significantly different approach. Their use will require a major redesign of the basic engine to address such issues as how to ignite the fuel (either by using an ignition system or a micro-pilot diesel injection).

 

 

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Microgrids not yet possible with today’s technology

Preface. This article says that renewables do increase grid fluctuations, but that power trading fluctuations were even larger, and that with current technology, microgrids are not possible yet.

Alice Friedemann   www.energyskeptic.com  author of “When Trucks Stop Running: Energy and the Future of Transportation”, 2015, Springer and “Crunch! Whole Grain Artisan Chips and Crackers”. Podcasts:  KunstlerCast 253, KunstlerCast278, Peak Prosperity]

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Hanley, S. Jan 12, 2018. New Study Looks At Managing Grid Frequency Fluctuations From Renewables. Cleantechnica.com

The electrical grid is not something most people think about. Flip the switch, the lights come on. If they don’t, call the electric company. End of story. But the grid is actually a hugely complex organism, one that requires close attention to keep the electricity flowing at the right voltage and frequency.

Frequency is a concept unknown to most people. Alternating current flows first one way and then the other. The number of times a second that transition takes place is expressed in hertz. In Europe, the standard is 50 hertz. In North America, it is 60 hertz. Frequency stability is important because fluctuations can interfere with the proper operation of many electronic devices.

Researchers at the Juelich Research Center and the Max Planck Institute for Dynamics and Self-Organization in Germany have studied the electrical grids in Europe, Japan, and the US, and come up with some surprising findings.

It is common to hear people say that renewables like solar and wind disrupt the grid because they vary in voltage and frequency depending on wind speed and cloud cover. There are also concerns about microgrids disrupting the stability of the larger utility grid. Researchers at the Juelich Research Center and the Max Planck Institute for Dynamics and Self-Organization in Germany have studied the electrical grids in Europe, Japan, and the US, and come up with some surprising findings.

“The first surprise was that the grid showed particularly strong fluctuations every 15 minutes,” says Dirk Witthaut of the Juelich Institute of Energy and Climate Research.”This is the exact time frame during which generators on the European electricity market agree on a new distribution for the electricity generated — this alters how much electricity is fed into the grid, and where. In Europe at least, power trading therefore plays a key role in balancing grid frequency fluctuations.” Fluctuations from power trading were larger than those from renewables. In other words, the grid is already dealing with frequency fluctuations that are larger than those caused by renewables.

The researchers found that frequency fluctuations did not follow the mathematically predicted model. Instead, they tend to be larger than expected. Are renewables responsible for that difference in behavior? The study found that renewables do in fact lead to greater grid fluctuations. For example, the share of wind and solar generation in the United Kingdom is much higher than in the USA, leading to greater fluctuations in grid frequency. Based on their research, the scientists recommend increased investment in primary controls and demand controls.

The scientists turned their attention to microgrids, and what they found is not such good news. “Our study indicates that dividing large and thus very slow grids — such as the synchronous grid of Continental Europe — into microgrids will cause larger frequency fluctuations,” says Benjamin Schaefer of the Max Planck Institute. “Technically, microgrids are therefore only an option if today’s very stringent frequency standards were to be relaxed.

Relaxing those standards would require a significant redesign of many electronic devices and could damage existing equipment. That finding suggests better ways of managing frequency fluctuations will be needed before a distributed grid composed of many microgrids can become a reality.

 

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